Monochrome palette
Bracken Delta
From #004f81 ink through #3578ae, #5193cb, #6ba3d3 to #87bff0 light, Bracken Delta is a analogous progression that holds together at any size. Use it for national-park posters with layered mountain silhouettes. The darkest and lightest stops clear AA for large text.
skymonochromefive-stop
#004f81
#3578ae
#5193cb
#6ba3d3
#87bff0
The generator opens with #004f81 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.