Sumi palette
Russet Marsh
Dark anchor, working middle, light release: #a0052c, #b82a3f, #00777b, #d84a58, #009599 form a analogous sumi set with somewhere to stand at every lightness. Made for museum exhibition graphics with long sightlines.
redsumifive-stop
#a0052c
#b82a3f
#00777b
#d84a58
#009599
The generator opens with #a0052c as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.