Blue Hour palette
Flickering Hollow
Dark anchor, working middle, light release: #195f9a, #4b89c4, #66a5e2, #80b4e9, #a3d1ff form a split-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
#195f9a
#4b89c4
#66a5e2
#80b4e9
#a3d1ff
The generator opens with #195f9a as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.