Opera palette
Harbor Lagoon
Dark anchor, working middle, light release: #005f8f, #008acc, #37a6ea, #5fb6f0, #91d1ff form a triadic opera set with somewhere to stand at every lightness. Made for museum exhibition graphics with long sightlines. The darkest and lightest stops clear AA for large text.
skyoperafive-stop
#005f8f
#008acc
#37a6ea
#5fb6f0
#91d1ff
The generator opens with #005f8f as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.