Storm palette
Foxglove Cellar
From #004753 ink through #007184, #308ca0, #529aaa to #6eb6c7 light, Foxglove Cellar 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
#004753
#007184
#308ca0
#529aaa
#6eb6c7
The generator opens with #004753 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.