Storm palette
Dappled Plaza
From #004650 ink through #007080, #308b9b, #5298a6 to #6eb5c3 light, Dappled Plaza 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
#004650
#007080
#308b9b
#5298a6
#6eb5c3
The generator opens with #004650 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.