Blue Hour palette
Butter Estuary
Dark anchor, working middle, light release: #005a8f, #0084ce, #35a0ec, #5db0f1, #8eccff form a tetradic blue hour set with somewhere to stand at every lightness. Made for national-park posters with layered mountain silhouettes. The darkest and lightest stops clear AA for large text.
skybluehourfive-stop
#005a8f
#0084ce
#35a0ec
#5db0f1
#8eccff
The generator opens with #005a8f as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.