Sumi palette
Woven Square
Five sumi stops with room to breathe — #951d00 grounds, #b52a07 and #007284 do the talking, #d54a2d softens, #008fa5 lifts. The tetradic bones keep it coherent across book covers that read at thumbnail size.
redsumifive-stop
#951d00
#b52a07
#007284
#d54a2d
#008fa5
The generator opens with #951d00 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.