Blue Hour palette
Polar Plaza
Five stops tuned to sit together without fighting — #005c71 ink anchors the set, #7bcfe9 opens it up, and #0188a5, #37a4c2, #5db2cb cross the middle in a tetradic arrangement. Polar Plaza suits national-park posters with layered mountain silhouettes. The darkest and lightest stops clear AA for large text.
cyanbluehourfive-stop
#005c71
#0188a5
#37a4c2
#5db2cb
#7bcfe9
The generator opens with #005c71 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.