Blue Hour palette
Silvery Fen
From #006485 ink through #0090be, #38acdc, #62bbe3 to #84d8ff light, Silvery Fen 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 for large text.
cyanbluehourfive-stop
#006485
#0090be
#38acdc
#62bbe3
#84d8ff
The generator opens with #006485 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.