Neon palette
Late Square
From #004482 ink through #006bc5, #2e87e3, #5198e7 to #73b4ff light, Late Square is a analogous progression that holds together at any size. Use it for hotel key cards and lobby signage in one system. The darkest and lightest stops clear AA as a text pair.
skyneonfive-stophigh-contrast
#004482
#006bc5
#2e87e3
#5198e7
#73b4ff
The generator opens with #004482 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.