Ocean palette
Perennial Crater
From #00504d ink through #007c78, #339793, #56a4a0 to #73c1bc light, Perennial Crater 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.
cyanoceanfive-stop
#00504d
#007c78
#339793
#56a4a0
#73c1bc
The generator opens with #00504d as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.