Storm palette
Birch Fen
From #004752 ink through #007282, #308d9d, #539ba8 to #6fb7c5 light, Birch 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 as a text pair.
cyanstormfive-stophigh-contrast
#004752
#007282
#308d9d
#539ba8
#6fb7c5
The generator opens with #004752 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.