Blue Hour palette
Sultry Kiln
Sultry Kiln runs #00647d through #0290b3, #39acd0, #62bad9 to #7fd7f7 in five measured steps, the analogous structure keeping every neighbor honest. Reach for it for book covers that read at thumbnail size. The darkest and lightest stops clear AA for large text.
cyanbluehourfive-stop
#00647d
#0290b3
#39acd0
#62bad9
#7fd7f7
The generator opens with #00647d as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.