Sumi palette
Glacier Archive
From #a8374b ink through #a64000, #895900, #c65364 to #c45c2a light, Glacier Archive is a split-complementary progression that holds together at any size. Use it for book covers that read at thumbnail size.
redsumifive-stop
#a8374b
#a64000
#895900
#c65364
#c45c2a
The generator opens with #a8374b as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.