Opera palette
Calico Crater
From #005184 ink through #1c7abd, #3f96db, #5fa5e0 to #7bc2ff light, Calico 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.
skyoperafive-stop
#005184
#1c7abd
#3f96db
#5fa5e0
#7bc2ff
The generator opens with #005184 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.