Opera palette
Vintage Manor
From #004574 ink through #006db2, #2f89d0, #5298d5 to #6eb4f3 light, Vintage Manor is a analogous progression that holds together at any size. Use it for event posters that compete with a wall of other posters. The darkest and lightest stops clear AA as a text pair.
skyoperafive-stophigh-contrast
#004574
#006db2
#2f89d0
#5298d5
#6eb4f3
The generator opens with #004574 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.