Sumi palette
Teal Loft
Five sumi stops with room to breathe — #7a301a grounds, #a55a44 and #c3755e do the talking, #cc8874 softens, #eaa48f lifts. The tetradic bones keep it coherent across book covers that read at thumbnail size. The darkest and lightest stops clear AA as a text pair.
redsumifive-stophigh-contrast
#7a301a
#a55a44
#c3755e
#cc8874
#eaa48f
The generator opens with #7a301a as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.