Retro palette
Pewter Boulevard
Dark anchor, working middle, light release: #005489, #167dc4, #3c99e2, #5ea9e7, #83c5ff form a split-complementary retro set with somewhere to stand at every lightness. Made for national-park posters with layered mountain silhouettes. The darkest and lightest stops clear AA for large text.
skyretrofive-stop
#005489
#167dc4
#3c99e2
#5ea9e7
#83c5ff
The generator opens with #005489 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.