Aurora palette
Pale Marsh
From #42649e ink through #006e93, #007378, #2f89af to #009097 light, Pale Marsh is a split-complementary progression that holds together at any size. Use it for book covers that read at thumbnail size.
cyanaurorafive-stop
#42649e
#006e93
#007378
#2f89af
#009097
The generator opens with #42649e as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.