Blue Hour palette
Brisk Crossing
Five stops tuned to sit together without fighting — #00517b ink anchors the set, #74c2f9 opens it up, and #007ab7, #3396d5, #58a5db cross the middle in a tetradic arrangement. Brisk Crossing suits book covers that read at thumbnail size. The darkest and lightest stops clear AA for large text.
skybluehourfive-stop
#00517b
#007ab7
#3396d5
#58a5db
#74c2f9
The generator opens with #00517b as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.