Opera palette
Soft Gazebo
From #004371 ink through #006baf, #2e86cd, #5196d2 to #6db2f0 light, Soft Gazebo is a monochromatic progression that holds together at any size. Use it for national-park posters with layered mountain silhouettes. The darkest and lightest stops clear AA as a text pair.
skyoperafive-stophigh-contrast
#004371
#006baf
#2e86cd
#5196d2
#6db2f0
The generator opens with #004371 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.