Sumi palette
Flickering Lagoon
Five sumi stops with room to breathe — #a00400 grounds, #d24233 and #f2604f do the talking, #f87c6a softens, #ffa89a 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
#a00400
#d24233
#f2604f
#f87c6a
#ffa89a
The generator opens with #a00400 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.