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→Contrast ratio of text and background
===Contrast ratio of text and background===
The contrast ratio of text to background color must be 4.5 or more to meet WCAG guidelines. You can check color combinations with these tools http://leaverou.github.io/contrast-ratio/ or https://webaim.org/resources/contrastchecker/
[[File:A11y-contrast.png|thumb|none|400px|Contrast ratio of text over different backgrounds and the WCAG requirements]]
Be extra careful if you are placing text over an image as the same rules apply.
