Opera palette
Olive Oasis
Five opera stops with room to breathe — #004562 grounds, #006e99 and #2f89b6 do the talking, #5197be softens, #6eb4db lifts. The triadic bones keep it coherent across book covers that read at thumbnail size. The darkest and lightest stops clear AA as a text pair.
skyoperafive-stophigh-contrast
#004562
#006e99
#2f89b6
#5197be
#6eb4db
The generator opens with #004562 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.