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→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/ Contrast Checker] or [https://webaim.org/resources/contrastchecker/ WebAIM's Contrast Checker]
[[File:A11y-contrast.png|thumb|none|alt=Screenshot of color combinations with contrast ratios|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. System colors can be modified by changing the [[Branding|branding]].
