Opera palette
Dusky Foundry
From #00618c ink through #018cc8, #38a8e6, #60b7ec to #8fd3ff light, Dusky Foundry is a triadic progression that holds together at any size. Use it for book covers that read at thumbnail size. The darkest and lightest stops clear AA for large text.
skyoperafive-stop
#00618c
#018cc8
#38a8e6
#60b7ec
#8fd3ff
The generator opens with #00618c as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.