Vesper Colors

Vesper Colors is a free color contrast checker for iOS and the web. Enter any foreground and background color pair and get an instant contrast ratio with WCAG 2.2 AA and AAA pass/fail results. No account, no paywall, no limits.

Available on

• iOS - download from the App Store
• Web - use directly at vesperapps.com/colors

In this section

• Overview - what Vesper Colors does and how to get started
• Checking Color Contrast - entering colors and reading your results
• Using the Color Picker - the HSV picker, hue slider, and hex input
• Preview Tab - seeing your pair applied to real UI components
• Color Blindness Simulation - previewing your pair across five vision types
• Sharing Color Pairs - generating and sharing a link to your exact pair
• WCAG 2.2 Thresholds - contrast ratio requirements explained
• Release Notes - what has changed in each version