Note to self: OKLCH hues are roughly 29=red, 58=orange, 110=yellow, 144=green, 195=turquoise, 250=blue, 301=purple, 328=pink. For OKLCH, 0.96 Lgt and 0.018 Chr works well for black text background colors. Also 0.98 and 0.009, which gives red, orange, yellow, green, turquoise, blue, purple, pink. For light text, 0.4/0.068 gives a nice background: red, orange, yellow, green, turquoise, blue, purple, pink.