Monochrome palette
Indigo Fen
Five stops tuned to sit together without fighting — #005076 ink anchors the set, #74c1f3 opens it up, and #007ab1, #3396ce, #58a4d5 cross the middle in a analogous arrangement. Indigo Fen suits national-park posters with layered mountain silhouettes. The darkest and lightest stops clear AA for large text.
skymonochromefive-stop
#005076
#007ab1
#3396ce
#58a4d5
#74c1f3
The generator opens with #005076 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.