Sumi palette
Amber Reef
Five sumi stops with room to breathe — #731700 grounds, #a63e26 and #c45a41 do the talking, #cc705a softens, #eb8c75 lifts. The triadic 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
#731700
#a63e26
#c45a41
#cc705a
#eb8c75
The generator opens with #731700 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.