Opera palette
Sienna Boulevard
Five opera stops with room to breathe — #004769 grounds, #0070a2 and #308bbf do the talking, #539ac6 softens, #6fb6e4 lifts. The analogous bones keep it coherent across museum exhibition graphics with long sightlines. The darkest and lightest stops clear AA as a text pair.
skyoperafive-stophigh-contrast
#004769
#0070a2
#308bbf
#539ac6
#6fb6e4
The generator opens with #004769 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.