Aurora palette
Ebony Foundry
From #004a60 ink through #007495, #318fb1, #549dba to #70bad8 light, Ebony Foundry is a analogous progression that holds together at any size. Use it for event posters that compete with a wall of other posters. The darkest and lightest stops clear AA as a text pair.
cyanaurorafive-stophigh-contrast
#004a60
#007495
#318fb1
#549dba
#70bad8
The generator opens with #004a60 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.