Retro palette
Steely Junction
From #9d471a ink through #5e56a9, #007654, #bb6238 to #00956b light, Steely Junction is a analogous progression that holds together at any size. Use it for book covers that read at thumbnail size.
orangeretrofive-stop
#9d471a
#5e56a9
#007654
#bb6238
#00956b
The generator opens with #9d471a as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.