Sumi palette
Birch Cottage
From #912e1c ink through #bd5b48, #dc7662, #e48c7a to #ffaa98 light, Birch Cottage is a triadic progression that holds together at any size. Use it for bike-shop liveries that survive mud and sun. The darkest and lightest stops clear AA for large text.
redsumifive-stop
#912e1c
#bd5b48
#dc7662
#e48c7a
#ffaa98
The generator opens with #912e1c as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.