![]() ![]() ![]() Incorporate patterns, text, or graphic symbols when possible. Avoid using color alone to provide information.Test your color schemes with colorblindness simulators.Ensure your color contrast is sufficient.No, you can use color! In fact, for some folks, the use of color can improve understanding. Chroma.js Color Palette Helper (for colorblind-safe combinations).Tools to help you design for colorblind users: Try a few tools to learn which ones best meet your needs.īe sure to check color contrast for all types of digital content: Browser extensions can only be used for web content, but are quick to access. TPGi’s Color Contrast Analyzer is a downloadable application that can be used for both documents and web content. Some tools require you to paste in hexadecimal codes, and some use eye droppers to identify colors. WCAG Color Contrast Checker (Chrome extension).TPGi’s Colour Contrast Analyser (downloadable app).There are lots of free tools to check color contrast. How do I meet color contrast requirements? Below is an example of a chart that uses color to convey information, and how it may appear to someone with deuteranopia: When color is used to provide information, many people will not be able to use that information.ĭeuteranopia is the most common type of color blindness, otherwise known as ‘red-green’ color blindness. There are several types of colorblindness although rare, some people only see in grayscale. ![]() Here’s an example of a colorful chart with text that lacks sufficient color contrast, and how it might appear to someone with cataracts:Īdditionally, about 1 in 12 men (and 1 in 200 women) have color vision deficiency, or are colorblind. Cataracts, macular degeneration, and glaucoma are a few conditions that make it hard to differentiate between some colors. People with a variety of visual impairments need sufficient contrast in order to read text. WCAG also requires that we not use color alone, or visual characteristics, to convey information.īelow are examples of text with insufficient color contrast ratios, as well an example that meets the requirement:.3:1 for large-scale text (typically used for headings).WCAG 2.0 AA require the following minimum color contrast ratios: Text, icons, and important graphics must have sufficient color contrast.What are the requirements for color contrast? Use of color to convey information: Examples of this are when a site uses color-coded graphics, or a red outline to highlight a wrong answer.Color contrast: The difference in lightness/darkness between two colors (not differences in hue).There are 2 main accessibility considerations when using color in your documents and web content: ![]()
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