Blue Hour palette
Rumpled Cabin
Dark anchor, working middle, light release: #0061aa, #378cdc, #55a8fb, #74b9ff, #acd4ff form a tetradic 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
#0061aa
#378cdc
#55a8fb
#74b9ff
#acd4ff
The generator opens with #0061aa as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.