Surf palette
Flint Dune
From #004846 ink through #007370, #308e8b, #529b98 to #6fb7b4 light, Flint 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 as a text pair.
cyansurffive-stophigh-contrast
#004846
#007370
#308e8b
#529b98
#6fb7b4
The generator opens with #004846 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.