I had to look up intarsia.
My mom taught me knit, purl, increase, decrease, slip, and cable. Then I've played with needles and yarn for several decades. Since I rarely find patterns that do what I want, I rarely follow patterns. I just experiment until I have what I want.
Like mittens should have the thumb come out of the body of the mitten at the angle my thumb does. Neither straight to the side nor in front of the pointer finger. And there shouldn't be a hole at the top of the thumb. Socks should be shorter on the little toe side. And so on.
Anyway, I don't know how I would do the pattern. If it had been small enough and not meant to be worn then I would probably float the color not being used. I don't like to float yarns more than a few stitches if they will be exposed to wear.
So far, I've considered:
- double knit (like for reversible patterns) and float the yarns between the sides (horizontally for the main color and vertically for the pattern colors).
- Embroider the design over the background color
- Double knit (where you caste on the top of one side and caste off the top of the other side and telescope them together), and float the yarns between the layers.
- Triple knit it so the background color can be defloated without showing.
- Intarsia (it is so much faster to say when you have a word for something)
I don't know which would work best. Or at all. I'm not opposed to a combination of techniques.