Sumi palette
Autumn Heath
From #7b1405 ink through #a74535, #c5604f, #cd7666 to #ec9281 light, Autumn Heath is a complementary progression that holds together at any size. Use it for hotel key cards and lobby signage in one system. The darkest and lightest stops clear AA as a text pair.
redsumifive-stophigh-contrast
#7b1405
#a74535
#c5604f
#cd7666
#ec9281
The generator opens with #7b1405 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.