New answers tagged vision
4
The W3C link provided by Mark in a comment on "Understanding WCAG 2.0" provides the source for the contrast ratio formula under the "Notes on formula" section.
The formula (L1/L2) for contrast is based on [ISO-9241-3] and [ANSI-HFES-100-1988] standards.
The ANSI/HFS 100-1988 standard calls for the contribution from ambient light to be ...
Top 50 recent answers are included