Blue Hour palette
Fiery Mesa
Five stops tuned to sit together without fighting — #005687 ink anchors the set, #81c8ff opens it up, and #1d80bf, #409cdd, #62abe3 cross the middle in a tetradic arrangement. Fiery Mesa suits book covers that read at thumbnail size. The darkest and lightest stops clear AA for large text.
skybluehourfive-stop
#005687
#1d80bf
#409cdd
#62abe3
#81c8ff
The generator opens with #005687 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.