Blue Hour palette
Luminous Orchard
Five blue hour stops with room to breathe — #00526d grounds, #007da4 and #3399c1 do the talking, #58a7c9 softens, #75c3e7 lifts. The tetradic bones keep it coherent across book covers that read at thumbnail size. The darkest and lightest stops clear AA for large text.
cyanbluehourfive-stop
#00526d
#007da4
#3399c1
#58a7c9
#75c3e7
The generator opens with #00526d as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.