Frost palette
Peaty Pier
From #006378 ink through #9b5741, #007992, #b8725b to #3294ae light, Peaty Pier is a analogous progression that holds together at any size. Use it for book covers that read at thumbnail size.
cyanfrostfive-stop
#006378
#9b5741
#007992
#b8725b
#3294ae
The generator opens with #006378 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.