Sumi palette
Marble Bluff
Five sumi stops with room to breathe — #842d00 grounds, #c24703 and #e1642f do the talking, #e87c53 softens, #ff9e79 lifts. The tetradic bones keep it coherent across book covers that read at thumbnail size. The darkest and lightest stops clear AA for large text.
orangesumifive-stop
#842d00
#c24703
#e1642f
#e87c53
#ff9e79
The generator opens with #842d00 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.