colour.RGB_to_HCL#

colour.RGB_to_HCL(RGB: Domain1, gamma: float = 3, Y_0: float = 100) → Range1[source]#

Convert from RGB colourspace to HCL colourspace according to Sarifuddin and Missaoui (2005) method.

Parameters:

RGB (Domain1) – RGB colourspace array.
gamma (float) – Non-linear lightness exponent matching Lightness \(L^*\).
Y_0 (float) – White reference luminance \(Y_0\).

Returns:

HCL array.

Return type:

numpy.ndarray

Notes

Domain	Scale - Reference	Scale - 1
`RGB`	1	1

Range	Scale - Reference	Scale - 1
`HCL`	1	1

This implementation uses the equations specified in [SM05b] with the corrections from [Sar21].

References

Examples

>>> RGB = np.array([0.45620519, 0.03081071, 0.04091952])
>>> RGB_to_HCL(RGB)
array([-0.0316785...,  0.2841715...,  0.2285964...])