Blue Hour palette
Terracotta Reef
Dark anchor, working middle, light release: #00637f, #008fb6, #38abd3, #61b9dc, #7ed7fa form a analogous 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
#00637f
#008fb6
#38abd3
#61b9dc
#7ed7fa
The generator opens with #00637f as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.