hwb()

The hwb() functional notation expresses a given color according to its hue, whiteness, and blackness. An optional alpha component represents the color's transparency.

Functional notation: hwb(H W B[ / A])

H (hue) is an <angle> of the color circle given in degs, rads, grads, or turns in CSS Color Module Level 4. When written as a unitless <number>, it is interpreted as degrees, as specified in CSS Color Module Level 3. By definition, red=0deg=360deg, with the other colors spread around the circle, so green=120deg, blue=240deg, etc. As an <angle>, it implicitly wraps around such that -120deg=240deg, 480deg=120deg, -1turn=1turn, etc.

W (whiteness) specifies the amount of white to mix in, as a percentage from 0% (no whiteness) to 100% (full whiteness).

B (blackness) specifies the amount of black to mix in, also from 0% (no blackness) to 100% (full blackness).

A (alpha) can be a <number> between 0 and 1, or a <percentage>, where the number 1 corresponds to 100% (full opacity).