Rainbow Colour Scheme - a start of something.

rainbow_scheme.py

from itertools import cycle
# the colors cycle in 3 different "rates"


def linspace(start, stop, num):
    """Generate num evenly spaced numbers over the interval [start, stop]."""
    if num < 2:
        return [start]
    step = (stop - start) / (num - 1)
    return [start + step * i for i in range(num)]


ok_cycle = [float(x) for x in linspace(0.44, 0.82, 6) + linspace(0.82, 0.44, 6)[1:-1]]
l_cycle = [float(x) for x in linspace(0.182, 0.13, 3) + linspace(0.13, 0.182, 3)[1:-1]]
ch_cycle = [float(x) for x in linspace(8, 335, 12)]


def offset_cycle(cycle, offset):
    return cycle[offset:] + cycle[:offset]


i = 0
for ok, l, ch in zip(
    cycle(offset_cycle(ok_cycle, 1)),
    cycle(offset_cycle(l_cycle, 4)),
    cycle(offset_cycle(ch_cycle, 11)),
):
    print(f'"oklch({ok:.2f} {l:.2f} {ch:.02f})",')
    i += 1
    if i >= 12:
        break