technically a cross stitch pattern, but it might translate to fair isle? I'd want to transcribe it onto knitting graph paper before doing 100 rows - stitches are not square! (site has tons of x-stitch patterns)
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.
Whit's Knits: Little Fair Isle Hat - The Purl Bee - Knitting Crochet Sewing Embroidery Crafts Patterns and Ideas! I'm making this with white as the MC and a beautiful multicolored blue/green for the patterned part