Sumi palette
Mahogany Dune
Five sumi stops with room to breathe — #a33321 grounds, #d0624e and #ef7e69 do the talking, #f69581 softens, #ffbdb0 lifts. The triadic bones keep it coherent across book covers that read at thumbnail size. The darkest and lightest stops clear AA for large text.
redsumifive-stop
#a33321
#d0624e
#ef7e69
#f69581
#ffbdb0
The generator opens with #a33321 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.