Opera palette
Restful Bazaar
Five opera stops with room to breathe — #126aa4 grounds, #4b94ce and #67b0ec do the talking, #83c0f3 softens, #b2dbff lifts. The analogous bones keep it coherent across book covers that read at thumbnail size. The darkest and lightest stops clear AA for large text.
skyoperafive-stop
#126aa4
#4b94ce
#67b0ec
#83c0f3
#b2dbff
The generator opens with #126aa4 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.