Retro palette
North Brook
Dark anchor, working middle, light release: #004564, #006e9c, #2f89b9, #5298c0, #6eb4de form a analogous retro 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.
skyretrofive-stophigh-contrast
#004564
#006e9c
#2f89b9
#5298c0
#6eb4de
The generator opens with #004564 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.