Blue Hour palette
Sooty Mesa
Dark anchor, working middle, light release: #005970, #0084a5, #35a0c2, #5caecb, #79cbe8 form a triadic blue hour set with somewhere to stand at every lightness. Made for book covers that read at thumbnail size. The darkest and lightest stops clear AA for large text.
cyanbluehourfive-stop
#005970
#0084a5
#35a0c2
#5caecb
#79cbe8
The generator opens with #005970 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.