Blue Hour palette
Yuzu Cellar
From #004e5c ink through #00798d, #3294a9, #56a2b3 to #73bed0 light, Yuzu Cellar is a split-complementary progression that holds together at any size. Use it for book covers that read at thumbnail size. The darkest and lightest stops clear AA for large text.
cyanbluehourfive-stop
#004e5c
#00798d
#3294a9
#56a2b3
#73bed0
The generator opens with #004e5c as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.