Sumi palette
Marigold Oasis
Five sumi stops with room to breathe — #8c0000 grounds, #c33226 and #e35242 do the talking, #e96e5e softens, #ff9181 lifts. The split-complementary 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
#8c0000
#c33226
#e35242
#e96e5e
#ff9181
The generator opens with #8c0000 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.