Blue Hour palette
Plum Estuary
Dark anchor, working middle, light release: #004270, #0069ae, #2e84cc, #5094d1, #6cb0ef form a monochromatic blue hour set with somewhere to stand at every lightness. Made for museum exhibition graphics with long sightlines. The darkest and lightest stops clear AA as a text pair.
skybluehourfive-stophigh-contrast
#004270
#0069ae
#2e84cc
#5094d1
#6cb0ef
The generator opens with #004270 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.