A website can function perfectly from a technical point of view and still be difficult to use if important aspects of accessibility are not taken into account. Small text, weak contrast, unclear buttons, or cluttered pages can make it harder for many people to access content and features. These issues are particularly noticeable for users with visual impairments, limited mobility, or difficulties processing information. However, a cracked screen, bright sunlight, or the need to use a device with one hand can also make a website less usable.
Accessible web design takes these situations into account from the very beginning. The aim is to present content clearly, make interactive elements easy to identify, and guide users through the website without unnecessary obstacles. Many of these measures also improve the overall user experience.
What Accessible Web Design and Web Accessibility Mean
The content and functions of an accessible website can be perceived, understood, and used by as many people as possible. Web accessibility takes different needs and usage situations into account. Users should be able to read content, understand videos, complete forms, and navigate menus, including when they rely on a keyboard, screen reader, screen magnification tool, or another assistive technology.
Colors, font sizes, spacing, and visual hierarchy determine how easy content is to recognize. A clear page structure and clearly labeled controls are just as important.
Creating an Accessible Website: Accessibility Starts at the Planning Stage
Many problems already arise during the design phase. If a very light brand color is used for text, for example, it may not provide enough contrast against the background. If forms are designed without visible field labels, the issue has to be corrected later during development.
If you want to create an accessible website, you should include accessibility requirements in the design process from the outset. Colors can be tested before they are used, and recurring elements such as buttons or forms can be designed according to consistent rules. Common user journeys should also be considered early on. Someone who wants to read an article, submit a contact form, or choose a product should be able to reach their goal without unnecessary steps.
Using Colors and Contrast Effectively
Colors create brand recognition and help draw attention to important elements. However, they can only serve this purpose if they are sufficiently distinguishable from one another.
Light gray text on a white background may appear subtle and modern, but it can be difficult for many people to read. Similar problems occur with colored buttons whose labels do not contrast clearly with the background.
Contrast should therefore be checked not only for standard body text. Small text, form instructions, links, icons, focus indicators, and error messages must also remain clearly visible.
Color should also never be the only way to communicate information. If an incorrectly completed form field is marked only in red, people with color vision deficiencies may not notice the indication. A clear error message and an additional symbol make it easier to understand which field requires attention.
The same applies to diagrams and charts. Multiple data sets are easier to distinguish when different line styles, patterns, or direct labels are used in addition to color.
Choosing Readable Typography
Readability does not depend on font size alone. The typeface, line spacing, text width, and background also affect how comfortably content can be read.
Clear typefaces with easily distinguishable characters are suitable for longer paragraphs. Very thin font weights can quickly become difficult to read on smaller screens. Decorative fonts may work for short headings but should not be used for longer passages or important information.
Very long lines make it difficult to find the correct starting point after moving to the next line. Lines that are too short, on the other hand, interrupt the reading flow. Limiting the width of text content helps keep paragraphs easy to follow, even on large screens.
There should also be enough space between lines and paragraphs. Densely packed text can quickly appear as one continuous block. Additional white space makes it easier to separate individual thoughts.
Users must also be able to enlarge text without content being cut off or sections overlapping.
Structuring Pages Clearly
A clear page structure helps users understand content quickly. It allows visitors to see which information belongs together and in what order it should be read.
Headings should be visually distinct from the body text. Different heading levels need clear visual differences. Spacing above and below a heading also helps show which section it belongs to.
Too many highlighted elements weaken this sense of direction. When headings, colored areas, large images, icons, and several buttons all compete for attention, it becomes difficult to identify what matters most.
Physical proximity also helps create clear relationships. A form field, for example, should be clearly associated with its label, and a product image with the relevant description.
Accessibility begins with the page structure and extends to small details, such as the visible outline around a selected form field.
Creating Clear Navigation
Navigation should show what content a website offers and where the user is currently located. Labels must be understandable without requiring users to know the company’s internal structure.
Menu items such as “Solutions,” “Services,” or “Offerings” can refer to very different content depending on the website. More specific wording helps users find the right page more quickly. Different terms should also not be used for the same section.
The main navigation should remain consistent across the website. On smaller screens, expandable menus must stay easy to identify and operate.
Dropdown menus should also not depend entirely on mouse movements. All links they contain must be accessible in other ways as well.
Making Links and Buttons Easy to Understand
Users should be able to recognize immediately which elements are clickable. A link that looks exactly like normal body text can easily be overlooked. Text that resembles a button but has no function creates the opposite problem by setting a false expectation.
Links should be visually distinguishable from the surrounding text. Color can help, but it should not be the only indicator. Underlining is particularly useful within longer passages.
The wording should explain where the link leads. “Click here” provides little information when removed from its surrounding sentence. Phrases such as “Compare hosting plans” or “Open the contact form” are more precise and remain understandable when a screen reader reads the links on a page separately.
Buttons should clearly describe the action they perform. In a form, “Send message” is more specific than “Continue.” During a checkout process, users must be able to tell whether a selection is simply being saved or whether the order is being placed.
The size of interactive elements is also important. Very small icons or links placed too close together can be difficult to select on a touchscreen.
Making Keyboard Navigation Visible
Not everyone uses a mouse or touchscreen to browse a website. Some people use the Tab key to move between links, buttons, and form fields.
The keyboard focus shows which element is currently selected. If this indicator is removed for visual reasons or is barely visible, users lose an important point of reference.
The focus order should also follow the visible structure of the page. Dialog windows and expandable menus need a clear and logical focus order as well.
A simple test is to use the entire website without a mouse. This quickly reveals whether all important functions are accessible and whether the current focus remains visible at all times.
Designing Forms Clearly
Forms are often a particular source of difficulty. Even minor uncertainties can leave users unsure about what information is required.
Every input field needs a visible label. A placeholder inside the field is not sufficient because it disappears once the user begins typing.
Additional instructions should appear directly next to the relevant field. If a specific date format or minimum password length is required, this information should be visible before the user starts entering data.
Required fields must be clearly marked. Longer forms are easier to follow when they are divided into clear sections.
Error messages should be as specific as possible. “Invalid input” does not explain what needs to be corrected. A message such as “Please enter the email address in the format name@your-example-domain.com” provides clear guidance.
Correctly entered information should remain in place after an error occurs. If users have to complete the entire form again, they are more likely to abandon the process.
Using Images and Icons Effectively
Images can explain content, create a certain mood, or draw attention to a topic. However, not every image serves the same purpose.
Purely decorative images do not require a detailed description. Images that communicate important information, by contrast, must also be understandable to people who cannot see them. During development, this is achieved by adding suitable alternative text. The design stage should therefore already define which images are informative and which are purely decorative.
Whenever possible, text should not be embedded directly into an image. It is harder to enlarge, cannot be interpreted easily by screen readers, and may become difficult to read on smaller screens.
Icons save space, but their meaning is not always obvious. Important functions should therefore include an additional label. The state of an icon should also be clearly recognizable.
Keeping Motion and Animation Under Control
Animations can make transitions easier to understand or draw attention to a change. Too much movement, however, distracts from the main content.
Automatically playing videos and rotating sliders can be particularly disruptive. Users need a clearly visible option to pause them.
Rapidly flashing or strongly flickering content should be avoided. Large background movements can also make text harder to read or cause physical discomfort.
Not every animation has to be removed completely. Short and subtle transitions can still be useful. What matters is that the information remains understandable without movement.
Testing Content Across Different Screen Sizes
Responsive design ensures that a website works on desktop computers, tablets, and smartphones. For accessibility, it is also important to check how content behaves at high zoom levels.
Navigation menus, tables, dialog windows, and forms must adapt to the available space. Text must not be cut off, buttons should not overlap, and important functions must remain accessible.
Fixed widths and heights often cause problems. Flexible containers and sufficient room for longer text are more reliable. This is also important for multilingual websites, as the same label may be considerably longer in another language.
Making Media Accessible
Video and audio content must remain understandable even when users cannot hear the sound. Spoken content should therefore include captions. Automatically generated captions can provide a starting point, but they need to be reviewed and corrected where necessary.
Captions should be easy to read and clearly separated from the background. Information such as speaker changes or relevant sounds can also be included when it is necessary for understanding the content.
A written transcript is useful for audio content. It also makes the information easier to search and allows users to read it in noisy environments.
If a video communicates important information only through visuals, a transcript of the spoken content is not enough. In that case, an additional description of the visible action may be required.
Using a Design System for Accessible Components
A design system helps ensure that recurring elements such as buttons, forms, and navigation menus follow consistent rules.
Colors, minimum sizes, spacing, and focus states can be defined centrally. This prevents the same function from looking different across pages and helps stop previously solved accessibility issues from reappearing in new components.
However, a design system does not replace testing. Standardized components still need to be reviewed whenever they are changed.
Testing a Website for Accessibility and Maintaining Accessibility Over Time
If you want to test a website for accessibility, automated tools are a useful place to start. They can measure color contrast, detect missing labels, and point out technical errors. However, they are not sufficient for a complete assessment.
A tool can confirm that an image has alternative text, but a person must decide whether that text describes the image meaningfully. Automated checks are also limited when it comes to identifying confusing navigation or poorly written error messages.
A website should therefore also be tested manually. This includes navigating by keyboard, increasing the zoom level, checking the website on different screen sizes, and, for important functions, using a screen reader. Tests involving people with different access needs are particularly valuable.
Because websites change continuously, accessibility should not be reviewed only once before launch. New images, text, forms, plugins, or external features can introduce new barriers later on. Clear guidelines for design, content, and development, together with regular checks of new or updated content, can help maintain accessibility over time.
Feedback from visitors can also help uncover problems that have not yet been noticed. An easy-to-find contact option should therefore be available.
FAQ: Frequently Asked Questions About Accessible Web Design and Accessible Websites
What Is the Difference Between Accessibility and Usability?
Accessibility aims to make websites usable by people with different physical, sensory, or cognitive needs. Usability describes more generally how easy and intuitive a website is to use. The two areas often overlap, but they are not the same.
Does Every Image on a Website Need Alt Text?
No. Images that convey important information need appropriate alt text. Purely decorative images should be implemented so that screen readers can skip them. The purpose of the image determines whether alt text is needed.
How Can I Check Whether My Website Is Accessible?
Automated testing tools can identify issues with contrast, labels, or technical elements, for example. Manual testing is also important, including navigating the website using only a keyboard, significantly zooming in on the page, and testing it with a screen reader.
Do Videos on an Accessible Website Need Captions?
Spoken content in videos should be available with captions. If important information is conveyed exclusively through visuals, an additional description of the visible content may also be necessary.
Why Should Accessibility Be Checked Regularly?
Websites change over time. New content, images, forms, plugins, or external features can introduce new barriers. Accessibility should therefore be checked not only before a website is published, but also after subsequent changes.
Does Accessible Web Design Have to Look Plain?
Accessibility does not require a particular visual style. Colors, images, and animations can still be used. However, they must be applied in a way that keeps content readable and functions easy to operate.
A reduced design can make orientation easier, but it is not always necessary. More complex layouts can also be accessible when their structure is clear.
Is High Color Contrast Enough?
Sufficient contrast improves readability, but it covers only one part of accessibility. A website may have strong contrast and still be difficult to use because of unclear menus, missing focus indicators, or poorly labeled forms. Design elements must therefore be considered together.
Are Larger Fonts Always Easier to Read?
A larger font can help, but it does not solve every problem. Very long lines, tight line spacing, or weak contrast can still make large text difficult to read. Users should also be able to enlarge the text themselves without breaking the layout.
Can a Plugin Make a Website Accessible?
A plugin can add individual features, such as options for changing colors or font sizes. However, it usually cannot correct fundamental problems in the page structure, navigation, or forms. Accessibility must be addressed directly in the design, content, and technical implementation.
Why Is Keyboard Navigation Important?
Some people cannot use a mouse or prefer to navigate more efficiently with a keyboard. They use the Tab key to move between interactive elements. If certain functions cannot be reached or the focus is invisible, they can use the website only to a limited extent.
What Benefits Does an Accessible Website Offer People Without Permanent Disabilities?
Clear text, easy-to-understand navigation, and sufficiently large controls make websites easier to use for many people. This applies, for example, in bright sunlight, with a slow internet connection, on a small smartphone screen, or while dealing with a temporary injury. A website that is easy to access is usually also easier to use.
Accessible Web Design Improves Usability for Everyone
Accessible web design begins with everyday design decisions. Readable text, recognizable buttons, clear forms, and straightforward navigation help people use content independently.
Many problems can be prevented when colors, components, and user journeys are reviewed early. Testing is still necessary later, as not every barrier can be identified in a static design.
A website does not need to look plain or uniform. However, visual design should never take priority over clarity. Good design is also reflected in how easily people can reach their goal without unnecessary obstacles.
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