colour
contrast.

a studio-grade contrast checker — wcag aa, aaa, non-text and apca scored across your whole palette, previewed on real interfaces and simulated for colour blindness.

01build

paste, pick, or drag up to ten colours

Hex (#FFF / #FFFFFF) or rgb(). One per line, comma or space.

tip: copy a screenshot and press ⌘/ctrl+V anywhere, or drop an image — colours are pulled out automatically.

or load one of 348 historical pairings from sanzo wada's dictionary of colour combinations

02arrange

drag the discs — left-to-right order drives everything below

03preview

your palette on real ui — click any role to reassign, lock 🔒 to keep it through shuffle

04matrix

every pair scored x/4 · row = background · column = text

pass fail 4 dots = AA · AAA · Non-text · APCA