Opera palette
Butter Gazebo
From #004370 ink through #006bad, #2e86ca, #5196d0 to #6db2ee light, Butter Gazebo is a triadic progression that holds together at any size. Use it for hotel key cards and lobby signage in one system. The darkest and lightest stops clear AA as a text pair.
skyoperafive-stophigh-contrast
#004370
#006bad
#2e86ca
#5196d0
#6db2ee
The generator opens with #004370 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.