The Color Contrast Analyzer also works for any documents you can open in the Chrome browser such as PDFs, however only the immediately visible portions of the document currently open to be read. It converts a page to an image and highlights areas where the edge between colors are different enough to meet the contrast requirement selected.Īs a designer the analyzer will help answer a question like “Does the white text of my navigation bar have enough contrast when setting over a background image?” Answer: Not so much in the case of News and several others, better add a background fill. This Chrome extension differs from other tools in being able to analyze text set on images or gradients as well as regular online text. There are many similar tools online, but this one remains one of the more simplified and easy to use. Hover over the value button in the middle and a tooltip will tell if you meet AA, AAA or both. The contrast value button will show green, orange, or red depending to show if the value is sufficient, pasts some criteria, or fails respectively. It will then display text using those values and calculate a contrast value. This contract ratio tool allows you to input a text color and background color as either a color name, or color value in hexadecimal (e.g. The list below contains some of the contrast checkers I use in accessible web design and accessibility audits of various websites and apps. Great Color Contrast Checkers for Accessibility Testing All larger text must have a contrast ratio of at least 4.5:1. The more stringent AAA criteria the requires text under 18 point (or 14 point if bold) to exceed a contrast ratio of 7:1. All larger text must have a contrast ratio of 3:1 or greater. To meet the level AA success criteria text smaller than 18 point (or 14 point if bold) must have a 4.5:1 contrast ratio. The Web Content Accessibility Guidelines (WCAG) 2.0 stipulate two minimum contrast ratios between text and its background color on websites, applications or mobile apps. This is doubly so when developing for persons with low-vision. After all, the more difficulty user have reading your information, the less likely they are to interact, engage, purchase or take whatever other action you consider key to success. When designing or developing accessible websites, web applications or mobile apps, it may be obvious that text should be very legible. Contrast Ratio Requirements for Text in WCAG 2.0 Level AA & AAA As a developer or someone conducting a website accessibility audit, you’ll likely want to use tools that can check completed web pages. You could also use other tools to check final design designs in their entirety. As a designer you can use a simple value checker to plug in foreground and background color value as you use them. Whether you are designing, developing, testing or auditing, a contrast ratio checker is the best way to ensure your site or app passes accessibility criteria. 21 Shares How To Know If Your Text Has Acceptable Contrast Ratios for Accessibility?
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