Sumi palette
Kelp Deck
Five sumi stops with room to breathe — #7f0500 grounds, #ac3f31 and #cb5b4b do the talking, #d27263 softens, #f18e7e lifts. The analogous 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
#7f0500
#ac3f31
#cb5b4b
#d27263
#f18e7e
The generator opens with #7f0500 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.