Sumi palette
Luminous Square
From #912e1f ink through #bd5b4a, #dc7664, #e48c7b to #ffaa9a light, Luminous Square is a tetradic progression that holds together at any size. Use it for craft brewery cans lined up in a cooler door. The darkest and lightest stops clear AA for large text.
redsumifive-stop
#912e1f
#bd5b4a
#dc7664
#e48c7b
#ffaa9a
The generator opens with #912e1f as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.