Sumi palette
Heather Foundry
Heather Foundry runs #7c2300 through #b5421a, #d45e39, #db7657 to #fa9272 in five measured steps, the tetradic structure keeping every neighbor honest. Reach for it for ceramics and home goods shot against white seamless. The darkest and lightest stops clear AA for large text.
redsumifive-stop
#7c2300
#b5421a
#d45e39
#db7657
#fa9272
The generator opens with #7c2300 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.