I think I like the pink and the green, they look like an Addy color. Try laying it with the pink as inner sashing and the green as borders that frame the blocks. Then reverse the process. I love the blocks. Or you could try with just the neons, but I do think the others will add the lively colors to the blanket and we do know the little gal is not quiet and muted like the blocks, so it needs a spark of color.
Just my thoughts, I can see a redheaded sweety holding the blanket close to her.