Blue Hour palette
Marble Saloon
Five stops tuned to sit together without fighting — #006073 ink anchors the set, #7cd3eb opens it up, and #008ca7, #37a8c4, #5fb6cd cross the middle in a analogous arrangement. Marble Saloon suits book covers that read at thumbnail size. The darkest and lightest stops clear AA for large text.
cyanbluehourfive-stop
#006073
#008ca7
#37a8c4
#5fb6cd
#7cd3eb
The generator opens with #006073 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.