Retro palette
Halcyon Mill
From #b43022 ink through #435ac7, #007c37, #d34e3e to #009b46 light, Halcyon Mill is a complementary progression that holds together at any size. Use it for hotel key cards and lobby signage in one system.
skyretrofive-stop
#b43022
#435ac7
#007c37
#d34e3e
#009b46
The generator opens with #b43022 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.