Blue Hour palette
Vintage Library
Dark anchor, working middle, light release: #00487f, #2b71b1, #488cce, #639cd5, #7eb8f3 form a monochromatic 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
#00487f
#2b71b1
#488cce
#639cd5
#7eb8f3
The generator opens with #00487f as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.