Sumi palette
Overcast Library
Five sumi stops with room to breathe — #903000 grounds, #cc4f17 and #ec6c3a do the talking, #f2845c softens, #ffac8e 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
#903000
#cc4f17
#ec6c3a
#f2845c
#ffac8e
The generator opens with #903000 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.