Sumi palette
Tranquil Kiln
Dark anchor, working middle, light release: #781900, #b1391c, #d05639, #d76f56, #f68b71 form a tetradic sumi set with somewhere to stand at every lightness. Made for museum exhibition graphics with long sightlines. The darkest and lightest stops clear AA as a text pair.
redsumifive-stophigh-contrast
#781900
#b1391c
#d05639
#d76f56
#f68b71
The generator opens with #781900 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.