Blue Hour palette
Coral Abbey
From #004384 ink through #1c6bbf, #3b87dd, #5997e1 to #75b4ff light, Coral Abbey is a tetradic progression that holds together at any size. Use it for book covers that read at thumbnail size. The darkest and lightest stops clear AA as a text pair.
skybluehourfive-stophigh-contrast
#004384
#1c6bbf
#3b87dd
#5997e1
#75b4ff
The generator opens with #004384 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.