Daylight palette
Terracotta Dune
From #00687f ink through #0095b4, #3ab1d1, #63bfda to #81ddf8 light, Terracotta Dune 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 for large text.
cyandaylightfive-stop
#00687f
#0095b4
#3ab1d1
#63bfda
#81ddf8
The generator opens with #00687f as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.