Color Blindness Simulator API

Simulate how a list of colours looks with each colour vision deficiency (Machado 2009 model) and flag pairs that become hard to tell apart for one chosen type. Colours only, not images.

See your colour palette as people with protanopia, deuteranopia, tritanopia, weaker anomalies or achromatopsia do, and spot colours that become hard to tell apart.

Input

Send these as a JSON object. Unknown fields are rejected.

colors

1 to 12 colours, one per line or separated by commas/spaces: hex, rgb(), hsl() or CSS names. (string, up to 2000 characters, required)

type

Deficiency used for the 'hard to tell apart' check. (string, one of protanopia, deuteranopia, tritanopia, protanomaly, deuteranomaly, tritanomaly, achromatopsia, default "deuteranopia")

severity

Severity for the -anomaly types, 0 to 1 (dichromacy types always use 1). (number, 0 to 1, default 1)

threshold

ΔE OK below which two simulated colours count as hard to tell apart. (number, 0.001 to 1, default 0.05)