Use 2 print yarns with strong contrast. You can see that even here with Crystal Palace Yarns Panda Superwash dark knight and mint print < a href=“http://www.straw.com/cpy/yarns/pandaSuperwash-card.html”&...;, there was still some wee overlap.
This design would also be fun with other yarns by Crystal Palace: Panda Cotton, Panda Soy, Maizy, and on smaller needles, Panda Silk; also 2 strands of Kid Merino might be fun!

am eager to see what colors of CPY you use!