Sumi palette
Polar Crater
Five sumi stops with room to breathe — #7c1900 grounds, #ad432b and #cc5f46 do the talking, #d3755f softens, #f2917a lifts. The triadic bones keep it coherent across hotel key cards and lobby signage in one system. The darkest and lightest stops clear AA as a text pair.
redsumifive-stophigh-contrast
#7c1900
#ad432b
#cc5f46
#d3755f
#f2917a
The generator opens with #7c1900 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.