Retro palette
Umber Alley
Dark anchor, working middle, light release: #b52535, #ce3f49, #008a91, #ee5d63, #00a9b1 form a split-complementary retro set with somewhere to stand at every lightness. Made for book covers that read at thumbnail size.
redretrofive-stop
#b52535
#ce3f49
#008a91
#ee5d63
#00a9b1
The generator opens with #b52535 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.