Contrast Ratio

Pure
ContrastRatio

Calculates the WCAG contrast ratio between two colors (1:1 to 21:1).

Type: Pure (no side effects)
Category: Fortuna|Color & Visual
Keywords: color & visual

Inputs

NameTypeDefaultDescription
ColorAFLinearColorColorA parameter
ColorBFLinearColorColorB parameter

Outputs

NameTypeDescription
ReturnValuefloatReturnValue output

Example Use Cases

Example 1

Verify text readability against background color.

Example 2

Validate UI color accessibility.