Knowledge Base ADA Compliance Color Contrast Article sections All colors that are layered on top of each other must have a contrast ratio of 4.5:1 or higher. Color contrast can be measured at the link below. WebAIM Contrast Checker Last Updated: 3 years ago in ADA Compliance Did this answer your question? If no, contact us below. Related Articles Color Contrast Adding Closed Captions Header Compliance Button Compliance Image Compliance PDF Compliance