Sumi palette
Cobalt Cottage
Five sumi stops with room to breathe — #811f00 grounds, #b4472a and #d36345 do the talking, #da7a60 softens, #f9967b 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
#811f00
#b4472a
#d36345
#da7a60
#f9967b
The generator opens with #811f00 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.