Blue Hour palette
Pumice Courtyard
Dark anchor, working middle, light release: #00647f, #1f90b2, #45accf, #68bad8, #86d7f6 form a tetradic blue hour set with somewhere to stand at every lightness. Made for newsletters where the header, links, and footers share one voice. The darkest and lightest stops clear AA for large text.
cyanbluehourfive-stop
#00647f
#1f90b2
#45accf
#68bad8
#86d7f6
The generator opens with #00647f as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.