Contrast

Color science for contrast utilities.

Utility methods for calculating contrast given two colors, or calculating a color given one color and a contrast ratio.

Contrast ratio is calculated using XYZ's Y. When linearized to match human perception, Y becomes HCT's tone and L*a*b*'s' L*.

Properties

open fun darker(tone: Double, ratio: Double): Double

Returns T in HCT, L* in L*a*b* <= tone parameter that ensures ratio with input T/L*.

Tone <= tone parameter that ensures ratio.

open fun lighter(tone: Double, ratio: Double): Double

Returns T in HCT, L* in L*a*b* >= tone parameter that ensures ratio with input T/L*.

Tone >= tone parameter that ensures ratio.

Contrast ratio of two tones.

Contrast ratio is a measure of legibility, its used to compare the lightness of two colors.