Blue Hour palette
Mustard Heath
Five stops tuned to sit together without fighting — #005f7b ink anchors the set, #7fd1f4 opens it up, and #138ab0, #3da6cd, #62b4d6 cross the middle in a tetradic arrangement. Mustard Heath suits hotel key cards and lobby signage in one system. The darkest and lightest stops clear AA for large text.
cyanbluehourfive-stop
#005f7b
#138ab0
#3da6cd
#62b4d6
#7fd1f4
The generator opens with #005f7b as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.