| Input type | Output type |
| color | float |
The hue function calculates the hue of a color and returns it. The hue ranges from 0 to 6. To construct a color from hue, saturation, and luminance values, use the hsl or hsla functions.
Examples:
hue(rgb(1, 0, 0)) ; 0.0 hue(rgb(0.5, 1, 0.3)) ; 1.714... hue(hsl(1.5, 1, 0.5)) ; 1.5
See Also
red function
sat function
lum function
alpha function
Writing direct coloring
algorithms