Sumi palette
Pastoral Orchard
Five sumi stops with room to breathe — #ab1900 grounds, #d9523c and #f96f57 do the talking, #ff8973 softens, #ffb8aa 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.
redsumifive-stop
#ab1900
#d9523c
#f96f57
#ff8973
#ffb8aa
The generator opens with #ab1900 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.