Opera palette
Twilit Ridge
From #004270 ink through #0069ae, #2e84cc, #5094d1 to #6cb0ef light, Twilit Ridge is a monochromatic progression that holds together at any size. Use it for museum exhibition graphics with long sightlines. The darkest and lightest stops clear AA as a text pair.
skyoperafive-stophigh-contrast
#004270
#0069ae
#2e84cc
#5094d1
#6cb0ef
The generator opens with #004270 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.