The law of closure is a visual perception law—or Gestalt principle—that describes how humans have a natural inclination to perceive incomplete or fragmented visual elements as a complete object. The brain typically fills in the gaps in an image where there are missing parts to perceive a unified and coherent form.
The Gestalt law or principle of closure is a recognized fundamental concept in the fields of design and visual perception. It comes from the 1920s’ German Gestalt school of psychology. The Gestalt psychologists explored how humans perceive and interpret visual stimuli and simplify complex images in certain ways. Gestalt is a German word that means “shape.” More precisely—in this context—it refers to an organized whole that is more than the sum of its parts.
The principle of closure is a grouping law of visual perception. According to the Gestalt psychologists, humans tend to perceive patterns using five main categories. These are the principle of proximity, the principle of similarity, the principle of continuity, the principle of closure and the principle of connectedness (or uniform connectedness).
The principle of closure at work—a dark triangle, even if the viewer sees three “Pac Man”-like heads “talking” to one another
© Craig Barber, Fair Use
Closure holds great importance in various design disciplines—including graphic design, user experience (UX) design and user interface (UI) design. When designers understand and apply this principle, they can create powerful visual designs—ones that are more engaging, memorable and effective in getting information across to users.
One of the key reasons why the principle of closure is important in design is the mind’s ability to simplify complex visuals fast and make a meaningful whole from individual elements. As with other principles like the law of continuity, this is a handy technique from the days of survival in the wild. Early humans had little time to perceive objects that were potentially hazardous, namely moving ones.
The principle of closure is something that turns up in various aspects of modern, everyday human life—and these range from how people recognize shapes and objects, to how they interpret symbols and logos. When designers use incomplete or fragmented elements, they can guide the viewer's eye. With that, they can encourage these users to mentally fill in those parts that are missing. This technique helps cut down on visual clutter; plus, it allows for a more streamlined and cohesive design.
What’s more, a good application of the principle of closure helps the user be more able to recognize and interpret the visual information in front of them quickly. The process is automatic—that’s because the mind strives to recognize the intended form or object, anyway. This cognitive process is something that users experience naturally—to comprehend and navigate through visuals more efficiently. A better user experience results.
The law of closure doesn’t just improve visual communication and the overall user experience—it adds depth and interest to designs, too. When they leverage the viewer's active participation in completing the missing parts—and do it well—designers can create visuals that are both visually intriguing and evoke curiosity. This engagement can help capture the viewer's attention and leave a lasting impression with a brand.
Closure “permits” viewers to question things as well as see them.
© Eva Shicker, Fair Use
The principle of closure has been the subject of extensive study through empirical research and observations. Numerous studies have shown that users and viewers do indeed respond to closure in visual stimuli. The German psychologists Max Wertheimer, Wolfgang Köhler and Kurt Koffka provided early evidence of how humans perceive and respond to closure through experiments involving such stimuli.
In more recent studies, neuroscientists have used brain imaging techniques, such as functional magnetic resonance imaging (fMRI). They’ve done this to look closely at the neural processes that are associated with closure perception. These studies have shown that when individuals encounter incomplete or fragmented visual stimuli, specific areas of the brain that are responsible for recognizing and completing patterns become active. This neural activity suggests that the brain automatically fills in the missing parts so the person can make out a complete object from an incomplete form.
Another point is that user testing and user feedback in design projects have consistently shown that closure plays a large role in how users perceive and understand visuals. Designs that effectively use closure principles tend to bring positive responses from users—responses that include increased engagement, improved comprehension and enhanced memorability.
Although the viewer can still tell B is a circle, A is more obviously one with closure.
© Alita Joyce, Fair Use
When designers apply closure well, they can make effective use of users’ tendency to fill in the blanks in images. Closure helps to:
Closure boosts the user's ability to understand and navigate through the interface—a phenomenon that leads to a more intuitive and efficient user experience.
Closure adds depth and interest to designs—and makes them visually engaging. Since it’s about getting the viewer actively involved in completing missing parts, closure can capture attention and make a memorable impression.
Closure helps when it comes to pattern recognition—letting users quickly spot and make sense of visual elements. Users—from mentally completing missing parts—can recognize forms or objects that are familiar to them. This fact enables efficient information processing and decision-making.
The viewer can fill in the missing information at a glance, such as the two other heads.
© PBS, Fair Use
UI and UX designers can apply the law or principle of closure when they use the key technique of utilizing incomplete or fragmented visual elements. They intentionally incorporate these in their design work to encourage the viewer's participation in completing the missing parts. Main uses of closure include:
Designers frequently use the law of closure in logo design. With this principle, they can create logos that are simple yet intriguing—logos that feature simple or abstract shapes which come into view easily for the user. For instance, they make logos that use negative space to suggest that there’s a shape or object that isn't explicitly drawn. This doesn’t just make the design more engaging; it helps in brand recall, too. For example, the World Wildlife Fund’s panda logo—with its iconic form—is an embodiment of the law of closure.
The World Wildlife Fund’s iconic panda logo is an example of closure in the wild—as outlined here.
© Tangient LL. Fair Use
Icons are an integral part of any interface—and they serve as visual cues for various actions or functions. Whenever they use the law of closure, designers can make icons that are minimalist yet effective—ones that users can easily recognize and understand.
On this Google Slides’ piece, the shape icon of a circle appears over what the human eye sees as a square.
© Alita Joyce, Fair Use
Designers also leverage the law of closure to indicate the presence of additional content and encourage interaction. For example, showing only parts of an item in a carousel tells users that more items lie past the visible area. Even if users can't guess the exact details of the partly displayed item, the fact that it’s incomplete suggests they can find more. Intrigued, they will feel prompted to interact with the digital product.
Carousels utilize the principle of closure here.
© Craig Barber, Fair Use
It takes thoughtful consideration to apply closure to user interfaces. Design elements and their arrangement need to become meaningful instantaneously.
Some best practices and tips on how to effectively apply the principle of closure to UI design include the following:
Designers do this to lessen unneeded complexity. Don’t clutter the interface with excessive details—this can keep users from perceiving closure. Instead, focus on using clean lines, minimalistic shapes and forms that are easy for users to recognize.
Negative space—also called white space—plays a crucial role in closure perception. So, use negative space in a strategic way to create implied shapes or forms. Carefully arrange and balance the empty areas around visual elements to help users mentally complete the missing parts and so they perceive a coherent whole.
Closure and space – important parts in a design strategy to help users find their way, right away.
© Travis Jones, Fair Use
Consistency in design is a vital thing for closure perception, so establish consistent visual patterns—like using similar shapes, colors or styles for related elements. Consistency helps viewers mentally group these elements together and then perceive them as a unified entity.
Other Gestalt principles—like proximity, similarity and common fate—can enhance how users perceive closure. So, use these principles to organize visual elements in a way that encourages viewers to mentally group them and perceive them as being a cohesive whole.
Think about the users’ context: what are they typically doing? Where are they? How many steps must they take to complete a goal? Designers need to know the user journey regarding how users encounter the design. An understanding of the user scenario is vital for designers to grasp—and understand well—and work with the expectations of the target users. So, design elements should fall into line with the users' mental models and expectations; that will make it easier for them to complete the missing parts. A design that’s too abstract or that diverges a great deal from user expectations may keep them from being able to perceive closure.
Do this to give users an easy advantage and help them on their way. The less “busy” an icon looks, the better—and closure is a smart and economical tool to hint at function.
Do this to encourage interaction—for example—in a carousel or below the fold in the screen. It’s especially vital to signal to users this way if important options aren’t readily visible on the screen that loads for them.
Conduct user testing and collect the feedback to assess how effective the users’ perception of closure is in your UI design. Iterate and refine the design based on user insights to ensure a seamless and intuitive user experience. User feedback will provide valuable insights into how users perceive and interact with the design, and visual closure—like other Gestalt principles—is a fundamental area to trial.
Users will be the ones to determine how successful a design is in the wild.
© Eduard Volianskyi, Fair Use
There are important factors to bear in mind when it comes to designing with the principle of closure—and here are some of them:
Think about what sort of cognitive load closure perception may put on users. Closure can simplify visuals, indeed, but it may also call for some mental effort from users to complete the missing parts. Designers should strike a balance between closure and cognitive load—a crucial thing to help make sure of a seamless user experience.
Consider the contextual relevance of closure in a design—closure mightn’t be applicable or effective in all contexts. So, assess whether closure is in line with the goals, content and target users of a UX design project. It should enhance the user experience and not create confusion or ambiguity. Inconsistent or incorrect interpretations will work against the design message. Ensure that users mentally complete missing parts in the same way, to make the same meaning.
Make sure that closure doesn’t hinder accessibility for users with visual impairments or cognitive challenges. As with color, shape and other factors, design elements should be perceivable and understandable without relying heavily on closure perception. Give users alternative ways to understand and interact with the interface for a more inclusive experience.
If designers add too many details in an image intended to trigger the closure response, it will defeat the purpose. An image needs to cue users to do the “automatic” work of completing the picture mentally, not feed them the whole story directly. Meanwhile, providing too little information will make it difficult for users to fill in the gaps. That sort of hesitation can lead to confusion and frustration. So, when it comes to segmenting content or page elements, consider just how much of that element will be on screen. What’s more, look at whether it's enough to communicate value and function.
Also be careful with the fold, especially on smaller screens. A tangent issue of closure is that users might assume a screen is complete because their minds have filled in the blanks prematurely. So, be sure that the users feel prompted to move or scroll down for more essential information or calls-to-action.
The segmented objects of Lucid appeared beyond the screen—to tell users they could swipe horizontally to discover more content.
© Alita Joyce, Fair Use
Testing is the only way to make sure that users can get the full picture. For example, can they understand what an icon represents right away? Designers may need to simplify the visual complexity of icons. User testing will show if users can decipher elements quickly, as well as how their perceptions may diverge if any elements need tweaking.
Overall, the law or principle of closure is a common and handy resource in a designer’s toolbox and a tried-and-tested design decision to include. Still, it can be difficult to apply to great effect at first. While designers shouldn’t underestimate its potential, neither should they underestimate the thought and strategy that are needed to leverage it best.
As with visual hierarchy and color theory, principles like the Gestalt law of closure are essential to master in user interface design. Designers who understand the power of such tools can use them to create visually compelling and cohesive designs that resonate with their target audience, optimize user experience and drive engagement further with their design work.
Good use of closure can help brands signal an iconic look simply and effectively as household names.
© Carrefour, Fair Use
Take our Gestalt Psychology and Web design: The Ultimate Guide course.
Read our insightful piece The Laws of Figure/Ground, Prägnanz, Closure, and Common Fate – Gestalt Principles (Part 3) with examples of the law of closure and other Gestalt laws.
Consult our piece in Gestalt principles of form perception in the Glossary of Human-Computer Interaction.
Find further fascinating insights in Principle of Closure in Visual Design | by Alita Joyce.
Read more in-depth information in Gestalt Theory: How Our Minds React to What We See | by Cidinha Moss.
Cultural background has a large bearing on how users perceive designs. For instance, in some cultures, symbolism and abstraction are prominent features in art and design. So, viewers might be more used to recognizing and appreciating works that showcase the law of closure at work. Then again, some cultures put an emphasis on clarity and explicitness—and viewers there might find designs based on this law less intuitive or appealing.
The interpretation of shapes and patterns, the symbolism that users attach to certain visual elements and the context in which these people encounter a design are things that can vary depending on cultural background. So, designers must understand these nuances to make sure their work gets the intended messages across effectively whatever the culture. It’s vital to appreciate cultural diversity and how cultures around the world may differ in perceiving what they see from how users in the United States perceive things, for example.
Take our course The Ultimate Guide to Visual Perception and Design for more in-depth insights.
The Gestalt law of closure can play a great part when it comes to boosting the accessibility of a design for users with varying abilities. Designers can use it to help make interfaces that are more inclusive—and they can also make ones that are easier to navigate, especially for users with visual or cognitive impairments.
Visual accessibility: For users with low vision, designs that feature the law of closure can be easier for them to interpret. As they suggest shapes and forms— without explicitly defining every detail—these designs reduce the amount of visual clutter. This makes it easier for those users who may struggle with complex visuals to make sense of the content and interact with it.
Cognitive accessibility: The law of closure also aids in cognitive accessibility. People with cognitive disabilities may find it easier to understand and remember information that’s presented in a simplified, cohesive form.
Universal design: Incorporate the law of closure well and it can help make sure that products are usable for—and accessible to—people with a wide range of abilities. This doesn’t just benefit users with disabilities. It provides a better user experience for all users from how it makes information more digestible and interfaces more intuitive, too.
Designers should, though, be mindful of relying too much on this principle. That’s because excessive use of closure can lead to ambiguity. This is what makes it crucial to strike a balance between simplicity and clarity. Designers should test designs with a diverse user group and think about the range of abilities and assistive technology that are involved.
Take our Accessibility: How to Design For All course for more in-depth insights into accessibility and design.
When they apply the Gestalt law of closure in complex or data-heavy interfaces, designers may face several challenges:
Balancing simplicity and clarity: Designers must make sure that while elements are simplified, the essential details do remain clear and understandable.
Cognitive overload: In data-heavy interfaces, there's a risk of cognitive overload from overusing the law of closure. So, designers need to be sure that users can easily perceive and understand the intended patterns or shapes—comfortably.
Diverse user interpretations: Different users may perceive incomplete elements differently. That’s something that can be due to their cultural background, experiences and cognitive abilities. So, it’s important to create designs that communicate effectively across a diverse user base—whatever the target audience or abilities involved.
Testing and validation: It takes rigorous user testing to make sure that the law of closure actually does contribute positively to the user experience. Designers need to validate their designs with real users.
Maintaining consistency: This is vital to apply the law of closure across various elements of the interface. If designers use closure inconsistently, what can result is confusion and a disjointed user experience.
Take our Conducting Usability Testing course to help make more user-friendly visual designs and play an important role in helping users interact with high-quality product designs.
The law of closure can do this through how it promotes a more intuitive and user-friendly interface. Here are some ways:
Simplify complex information: When they use the law of closure—and use it well—designers can present complex information in a more simplified way. Users fill in the missing parts—and naturally. So, designers can avoid over-cluttering the interface with excessive details. This simplification makes it easier for users to navigate through the information and make sense of the underlying structure in user interface design.
Create intuitive navigation elements: Designers can use the closure principle to create navigation elements that are more intuitive. For example, icons or buttons may not need to be fully detailed if users can easily perceive their function and form through closure. This can lead to a cleaner design and a more intuitive user experience on a digital product.
Streamline user flows: The closure law can help with the streamlining of user flows by how it reduces visual noise and focuses users' attention on getting tasks completed. Well-designed paths using this principle can lead users naturally from one step to the next—so enhancing the overall usability of the system.
Take our Gestalt Psychology and Web Design: The Ultimate Guide course for more in-depth insights.
Yes, the law of closure can have a large influence on how designers pick colors and contrasts in UI design. This principle interacts with color and contrast in such a way that it can affect how users perceive and interpret visual elements. It does this in these ways:
Enhancing element visibility: From using contrasting colors, designers can emphasize those parts of an element that are crucial for the law of closure to take effect.
Creating depth and focus: Designers can use color gradients and contrasting colors in such a way that they make a sense of depth.
Improving comprehension: Proper use of colors and contrasts can improve the user's ability to understand shapes or patterns that are complete.
Affecting emotional response: For example, if designers use warm, contrasting colors for incomplete shapes, it can make the interface feel more inviting and engaging.
Guiding user interaction: The strategic use of colors and contrasts can guide user interaction with elements that utilize the closure principle. A well-designed, color-contrasted incomplete element can attract the user's attention and indicate where to take action.
For more on how aspects of color work in UI and other elements related to visual design skills, watch this video from CEO of Hype4, Michal Malewicz.
Designers can use the law of closure in innovative applications in emerging UX/UI trends like Voice User Interfaces (VUIs) and Augmented Reality (AR). They can enhance the user experience by leveraging users' perceptual tendencies. Here are important application areas:
Voice User Interfaces (VUIs):
Contextual completion: In VUIs, the law of closure helps to create a more natural interaction. Users often provide incomplete commands or information, and designers engineer systems to fill in the gaps contextually, anticipating user needs or next steps. This is much like how the human brain uses closure to complete patterns.
Feedback loops: Visual indicators or sounds in VUIs often hint at the system's status or next steps. These cues, although not complete representations, allow users to perceive the system's state or the completion of a task. Doing so, they apply the principle of closure to user-system interaction.
Augmented Reality (AR):
Visual layering: AR interfaces use the law of closure by overlaying digital information on the real world. Users naturally fill in the gaps between digital and physical elements. This creates a cohesive experience where incomplete digital elements seem part of the physical space.
Interactive storytelling: AR features the closure principle in storytelling—where users' actions or movements complete the narrative. The story unfolds based on user interaction. What’s more, the brain's tendency to fill in gaps makes for a seamless and immersive experience.
Another thing is that designers can harness artificial intelligence (AI) as well as a range of tools and skills related to visual elements and design principles in UI design for AR and voice commands for VUIs to optimize experiences for a wide range of users. Meanwhile, they should consider important issues such as accessibility to help make their designs even more user friendly as well as innovative.
Watch as CEO of Experience Dynamics, Frank Spillers explains what AR is and involves:
Chang, D., Dooley, L., & Tuovinen, J. E. (2002). Gestalt Theory in Visual Screen Design — A New Look at an old subject. In Selected Papers from the 7th World Conference on Computers in Education (WCCE’01), Copenhagen, Computers in Education 2001: Australian Topics, Volume 8 (pp. 5–12). Melbourne: Australian Computer Society.
This publication revisits the application of Gestalt theory in educational visual screen design. It critically examines the common yet narrow application of Gestalt laws in design literature and identifies eleven relevant laws for enhancing visual screen design in educational contexts. The study applies these principles to redesign an instructional multimedia application, 'WoundCare', and presents an evaluation of the new designs based on user feedback, highlighting the positive impact of these principles on learning and design aesthetics.
Li, Y., & Fu, K. (2022). Research on Minimalism in Interface Design Based on Gestalt Psychology. In Proceedings of the 2022 International Conference on Science Education and Art Appreciation (SEAA 2022). Atlantis Press.
This publication explores the application of Gestalt psychology in minimalist interface design, particularly analyzing interfaces from Apple and Huawei. It discusses how Gestalt principles aid in structuring information in a user-friendly manner and enhance user experience by simplifying visual elements and aligning them with human visual perception principles. The study underscores the synergy between Gestalt principles and minimalist design, proposing advantages for user comprehension and interface aesthetics.
Malone, E. (2023). A Guide to Gestalt Principles for UX Designers: A mini visual design guide to help user experience designers leverage gestalt principles for better designs. 8 paw press.
This book offers a concise exploration of Gestalt principles in UX design. Erin Malone provides a practical guide, applying these principles to digital interfaces with a focus on mobile and web examples. The book delves into visual hierarchy, animation, and microinteractions—with the aim being to help readers improve design skills. It also includes downloadable templates for design documentation—which make it a hands-on resource for UX designers.
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Here’s the entire UX literature on the Law of Closure by the Interaction Design Foundation, collated in one place:
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