Retro palette
Nightfall Cellar
From #b53421 ink through #cd4b37, #008c9f, #ed6852 to #00aac1 light, Nightfall Cellar is a tetradic progression that holds together at any size. Use it for book covers that read at thumbnail size.
redretrofive-stop
#b53421
#cd4b37
#008c9f
#ed6852
#00aac1
The generator opens with #b53421 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.