Opera palette
Chalky Bluff
From #004675 ink through #0f6eb1, #3589cf, #5699d4 to #71b5f2 light, Chalky Bluff 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 for large text.
skyoperafive-stop
#004675
#0f6eb1
#3589cf
#5699d4
#71b5f2
The generator opens with #004675 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.