Sumi palette
Opal Atelier
Five stops tuned to sit together without fighting — #9a2b00 ink anchors the set, #ffb19a opens it up, and #d44d22, #f46a41, #fa8462 cross the middle in a analogous arrangement. Opal Atelier suits packaging that photographs well under harsh retail light. The darkest and lightest stops clear AA for large text.
redsumifive-stop
#9a2b00
#d44d22
#f46a41
#fa8462
#ffb19a
The generator opens with #9a2b00 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.