Nautical palette
Tumbleweed Lagoon
From #004555 ink through #006f87, #308aa3, #5198ad to #6db4ca light, Tumbleweed Lagoon 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.
cyannauticalfive-stophigh-contrast
#004555
#006f87
#308aa3
#5198ad
#6db4ca
The generator opens with #004555 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.