Retro palette
Crimson Kiln
Five stops tuned to sit together without fighting — #004577 ink anchors the set, #72b5f4 opens it up, and #126db3, #3689d1, #5698d6 cross the middle in a analogous arrangement. Crimson Kiln suits hotel key cards and lobby signage in one system. The darkest and lightest stops clear AA as a text pair.
skyretrofive-stophigh-contrast
#004577
#126db3
#3689d1
#5698d6
#72b5f4
The generator opens with #004577 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.