colour.utils.color_scale

colour.utils.color_scale(begin_hsl: Tuple[float, float, float], end_hsl: Tuple[float, float, float], nb: int) → Sequence[Tuple[float, float, float]]

Return a list of nb color HSL tuples between begin_hsl and end_hsl.

>>> from colour import color_scale, rgb2hex, hsl2rgb

>>> [rgb2hex(hsl2rgb(hsl)) for hsl in color_scale((0, 1, 0.5),
...                                               (1, 1, 0.5), 3)]
['#f00', '#0f0', '#00f', '#f00']

>>> [rgb2hex(hsl2rgb(hsl))
...  for hsl in color_scale((0, 0, 0),
...                         (0, 0, 1),
...                         15)]  
['#000', '#111', '#222', ..., '#ccc', '#ddd', '#eee', '#fff']

Of course, asking for negative values is not supported:

>>> color_scale((0, 1, 0.5), (1, 1, 0.5), -2)
Traceback (most recent call last):
...
ValueError: Unsupported negative number of colors (nb=-2).