Opera palette
Dusky Granary
From #004867 ink through #00719f, #308cbc, #539bc4 to #6fb7e1 light, Dusky Granary is a analogous 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 for large text.
skyoperafive-stop
#004867
#00719f
#308cbc
#539bc4
#6fb7e1
The generator opens with #004867 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.