![]() WebAIM’s Color Contrast Checker: This web-based tool allows you to select or enter colour values to test, and provides you with a “pass” or “fail” on your contrast ratio.There are many online and downloadable tools available to help you evaluate colour-contrast ratios. Image displays four examples of different font colour against different background colours only one of the sample combinations provides sufficient colour contrast. ![]() Level AAA of the “Web Content Accessibility Guidelines (WCAG 2.0)” requires that “the visual presentation of text and images of text has a contrast ratio of at least 7:1.” The following image presents four different foreground/background colour-contrast examples to illustrate insufficient and sufficient colour contrast ratios. If the colour palette you have adopted is too subtle (e.g., white text on a pastel background medium-grey text on a light-grey background), the contrast between your foreground and background is probably insufficient for some students. Students with low vision and/or a form of colour blindness may have difficulty reading text that does not contrast enough with the background colour selected. In order to use colour in a way that is most accessible, take into account colour contrast between text and background, and whether or not colour is used to convey information and the location of a link. Use a print copy that is in black and white.Are colour blind and cannot differentiate between certain colours.confirm that you are not using colour alone to convey this information.Have you used colour to convey concepts or information? If so, you should:.confirm that the colour of your web links is distinct from both your background colour and the colour of the surrounding text. ![]()
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