Opera palette
Hickory Library
From #006287 ink through #268dbb, #48a9d8, #6ab8e0 to #87d5ff light, Hickory Library is a split-complementary 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.
cyanoperafive-stop
#006287
#268dbb
#48a9d8
#6ab8e0
#87d5ff
The generator opens with #006287 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.