Sumi palette
Flint Mill
From #873b19 ink through #b26546, #d08060, #d99478 to #f7b094 light, Flint Mill is a triadic progression that holds together at any size. Use it for hotel key cards and lobby signage in one system. The darkest and lightest stops clear AA for large text.
orangesumifive-stop
#873b19
#b26546
#d08060
#d99478
#f7b094
The generator opens with #873b19 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.