Sumi palette
Perennial Outpost
Dark anchor, working middle, light release: #942100, #b52b00, #007285, #d54b2a, #008fa6 form a tetradic sumi set with somewhere to stand at every lightness. Made for national-park posters with layered mountain silhouettes.
redsumifive-stop
#942100
#b52b00
#007285
#d54b2a
#008fa6
The generator opens with #942100 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.