Sumi palette
Tranquil Reef
From #732542 ink through #9e4f69, #bb6983, #c57d93 to #e399af light, Tranquil Reef is a split-complementary progression that holds together at any size. Use it for book covers that read at thumbnail size. The darkest and lightest stops clear AA as a text pair.
pinksumifive-stophigh-contrast
#732542
#9e4f69
#bb6983
#c57d93
#e399af
The generator opens with #732542 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.