Sumi palette
Quiet Bluff
From #840d00 ink through #ba3725, #da5541, #e06f5c to #ff8c78 light, Quiet Bluff is a analogous progression that holds together at any size. Use it for dashboards where status colors must survive color-vision differences. The darkest and lightest stops clear AA as a text pair.
redsumifive-stophigh-contrast
#840d00
#ba3725
#da5541
#e06f5c
#ff8c78
The generator opens with #840d00 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.