Blue Hour palette
Cobalt Marsh
Five blue hour stops with room to breathe — #005887 grounds, #3282b7 and #509ed4 do the talking, #6daddc softens, #89cafa lifts. The monochromatic bones keep it coherent across book covers that read at thumbnail size. The darkest and lightest stops clear AA for large text.
skybluehourfive-stop
#005887
#3282b7
#509ed4
#6daddc
#89cafa
The generator opens with #005887 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.