Surf palette
Citrus Hollow
From #004754 ink through #007185, #308ca1, #529aab to #6eb6c8 light, Citrus Hollow is a tetradic 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
#004754
#007185
#308ca1
#529aab
#6eb6c8
The generator opens with #004754 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.