Neon palette
Indigo Fen
From #7f5685 ink through #816224, #00767d, #9b70a1 to #319198 light, Indigo Fen is a analogous progression that holds together at any size. Use it for event posters that compete with a wall of other posters.
cyanneonfive-stop
#7f5685
#816224
#00767d
#9b70a1
#319198
The generator opens with #7f5685 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.