Contrast Tests

sRGB

white	black		21
white	white		1
#ffe	white		1.010070
#afbaae	white		2.008125
#8b9986	white		3.000644
#765	white		5.502984

Display P3

color(display-p3 0.555354 0.5982801 0.5316741)

white

3.000644

LCH

lch(50% 0 0)

white

4.4836

With NaN

lch(50% 0 NaN)

white

4.4836