Sumi palette
Oyster Courtyard
From #9f3040 ink through #b74653, #008284, #d6626d to #00a0a2 light, Oyster Courtyard is a monochromatic progression that holds together at any size. Use it for book covers that read at thumbnail size.
redsumifive-stop
#9f3040
#b74653
#008284
#d6626d
#00a0a2
The generator opens with #9f3040 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.