Blue Hour palette
Drowsy Lighthouse
From #004d62 ink through #007797, #3292b3, #55a0bd to #72bdda light, Drowsy Lighthouse is a analogous 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
#004d62
#007797
#3292b3
#55a0bd
#72bdda
The generator opens with #004d62 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.