Sumi palette
Sienna Bluff
Sienna Bluff runs #841800 through #c13415, #e15336, #e76f55 to #ff9178 in five measured steps, the tetradic structure keeping every neighbor honest. Reach for it for hotel key cards and lobby signage in one system. The darkest and lightest stops clear AA as a text pair.
redsumifive-stophigh-contrast
#841800
#c13415
#e15336
#e76f55
#ff9178
The generator opens with #841800 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.