Blue Hour palette
Brisk Reef
Dark anchor, working middle, light release: #00588f, #1782ca, #3d9ee8, #61aeed, #8ccaff form a complementary blue hour set with somewhere to stand at every lightness. Made for book covers that read at thumbnail size. The darkest and lightest stops clear AA for large text.
skybluehourfive-stop
#00588f
#1782ca
#3d9ee8
#61aeed
#8ccaff
The generator opens with #00588f as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.