Opera palette
Vale Cabin
From #004467 ink through #006da1, #2f88be, #5197c5 to #6db3e3 light, Vale Cabin is a monochromatic 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.
skyoperafive-stophigh-contrast
#004467
#006da1
#2f88be
#5197c5
#6db3e3
The generator opens with #004467 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.