Retro palette
Umber Moor
From #9f002f ink through #b82641, #007779, #d8475a to #009497 light, Umber Moor is a split-complementary progression that holds together at any size. Use it for book covers that read at thumbnail size.
redretrofive-stop
#9f002f
#b82641
#007779
#d8475a
#009497
The generator opens with #9f002f as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.