Sumi palette
Plum Foundry
Five sumi stops with room to breathe — #760027 grounds, #a93049 and #c84d62 do the talking, #cf6675 softens, #ee8290 lifts. The tetradic bones keep it coherent across national-park posters with layered mountain silhouettes. The darkest and lightest stops clear AA as a text pair.
redsumifive-stophigh-contrast
#760027
#a93049
#c84d62
#cf6675
#ee8290
The generator opens with #760027 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.