I'm pinning this for inspiration even though there isn't a pattern given for this. Link takes you to ravelry lorijo's fair isle cardigan. She used unknown sweater pattern, fair isle pattern from some mitts, and colors inspired by a painting.
English roses and ivy meander around the crown of Sheila Joynes’s chic topper. Stitched in the round from the corrugated rib band up, this is a terrific first fair Isle project for an otherwise experienced knitter.