Sumi palette
Umber Canyon
Five sumi stops with room to breathe — #7a0702 grounds, #a63f32 and #c45b4c do the talking, #cc7163 softens, #eb8d7d lifts. The tetradic bones keep it coherent across newsletters where the header, links, and footers share one voice. The darkest and lightest stops clear AA as a text pair.
redsumifive-stophigh-contrast
#7a0702
#a63f32
#c45b4c
#cc7163
#eb8d7d
The generator opens with #7a0702 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.