Retro palette
Larkspur Caravan
From #a10015 ink through #ba282b, #007681, #da4945 to #0094a0 light, Larkspur Caravan is a analogous progression that holds together at any size. Use it for event posters that compete with a wall of other posters.
redretrofive-stop
#a10015
#ba282b
#007681
#da4945
#0094a0
The generator opens with #a10015 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.