Storm palette
Lunar Lodge
From #004654 ink through #007086, #308ba2, #5299ac to #6eb5c9 light, Lunar Lodge is a analogous progression that holds together at any size. Use it for book covers that read at thumbnail size. The darkest and lightest stops clear AA as a text pair.
cyanstormfive-stophigh-contrast
#004654
#007086
#308ba2
#5299ac
#6eb5c9
The generator opens with #004654 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.