Contrast and Color Accessibility
Understanding WCAG 2 Contrast and Color Requirements
Contrast and color use are vital to accessibility. Users, including users with visual disabilities, must be able to perceive content on the page. There is a great deal of fine print and complexity within the Web Content Accessibility Guidelines (WCAG) 2 that can easily confuse web content creators and web accessibility evaluators. This article pulls together the terms and principles needed to understand WCAG 2 requirements for contrast and color.
Colors can be defined in a few ways. For example, this shade of blue may commonly be defined in three different ways in webpage styles:
- rgb (97, 97, 255): The amount of red, green, and blue that form a color are each presented as a number between 0 and 255.
- #6161FF: This is a "hexadecimal" format where the red/green/blue values are presented as a combination of six letters [...]