Contrast References

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General

Contrast minimum

3WC - Web Accessibility Initiative

https://www.w3.org/WAI/WCAG21/Understanding/contrast-minimum.html

Provide sufficient contrast between foreground and background

3WC - Web Accessibility Initiative

https://www.w3.org/WAI/tips/designing/#provide-sufficient-contrast-between-foreground-and-background

Contrast calculator

Calculating and testing easily accessible colour combinations

https://www.leserlich.info/werkzeuge/kontrastrechner/index-en.php

Colours and contrast

Accessibility Developer Guide

https://www.accessibility-developer-guide.com/knowledge/colours-and-contrast/

Article: Color and contrast accessibility

Dave Gash, Meggin Kearney, Rachel Andrew, Rob Dodson

https://web.dev/color-and-contrast-accessibility/