Sumi palette
Hazy Lagoon
Five sumi stops with room to breathe — #6b2400 grounds, #a83d00 and #c7592a do the talking, #ce704a softens, #ed8c66 lifts. The triadic bones keep it coherent across book covers that read at thumbnail size. The darkest and lightest stops clear AA as a text pair.
orangesumifive-stophigh-contrast
#6b2400
#a83d00
#c7592a
#ce704a
#ed8c66
The generator opens with #6b2400 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.