Green and purple are a good color match. Of course if you want to get into the full tertiary you could add some orange to round things out but I think this is looking pretty nice. Do you care? No? Either do I. Just eat it!
I love the large, polka-dot type sprinkles here. They make everything feel like the most special party. If someone makes you something with oversized sprinkles, it's pretty obvious that they love you more than anyone loved you before. FACT.