Monochrome palette
Opal Porch
From #00668e ink through #0092c8, #39aee6, #63bded to #94d8ff light, Opal Porch 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.
cyanmonochromefive-stop
#00668e
#0092c8
#39aee6
#63bded
#94d8ff
The generator opens with #00668e as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.