sRGB (`hsl()` and `hwb()`)

CIE Lab (`lch()`)

OKLab (`oklch()`)

lch(1 40 0)
lch(10 40 0)
lch(20 40 0)
lch(30 40 0)
lch(40 40 0)
lch(50 40 0)
lch(60 40 0)
lch(70 40 0)
lch(80 40 0)
lch(90 40 0)
lch(99 40 0)
oklch(1 .12 0)
oklch(10 .12 0)
oklch(20 .12 0)
oklch(30 .12 0)
oklch(40 .12 0)
oklch(50 .12 0)
oklch(60 .12 0)
oklch(70 .12 0)
oklch(80 .12 0)
oklch(90 .12 0)
oklch(99 .12 0)