Blue Hour palette
Stone Deck
Five stops tuned to sit together without fighting — #004c66 ink anchors the set, #72bcdf opens it up, and #00769c, #3291b9, #55a0c1 cross the middle in a analogous arrangement. Stone Deck suits book covers that read at thumbnail size. The darkest and lightest stops clear AA for large text.
cyanbluehourfive-stop
#004c66
#00769c
#3291b9
#55a0c1
#72bcdf
The generator opens with #004c66 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.