Sumi palette
Milky Cellar
Five sumi stops with room to breathe — #971500 grounds, #b6240b and #007181 do the talking, #d6462e softens, #008ea2 lifts. The triadic bones keep it coherent across book covers that read at thumbnail size.
redsumifive-stop
#971500
#b6240b
#007181
#d6462e
#008ea2
The generator opens with #971500 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.