Sumi palette
Indigo Boulevard
From #8d1900 ink through #c53e23, #e55c40, #eb765e to #ff9a84 light, Indigo Boulevard is a triadic 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 for large text.
redsumifive-stop
#8d1900
#c53e23
#e55c40
#eb765e
#ff9a84
The generator opens with #8d1900 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.