Monochrome palette
Vintage Boulevard
From #004777 ink through #006fb6, #308bd4, #539ad9 to #6fb7f7 light, Vintage Boulevard 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.
skymonochromefive-stophigh-contrast
#004777
#006fb6
#308bd4
#539ad9
#6fb7f7
The generator opens with #004777 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.