Sumi palette
Birch Brook
From #8f2c46 ink through #a64159, #007972, #c45c73 to #00978f light, Birch Brook is a tetradic progression that holds together at any size. Use it for hotel key cards and lobby signage in one system.
pinksumifive-stop
#8f2c46
#a64159
#007972
#c45c73
#00978f
The generator opens with #8f2c46 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.