There's no fashion rule that says prints can only be paired with solids. Have you ever thought about taking that polka dot shirt and pairing it with your favorite striped ankle pants? No? I knew you'd say that. Here's a little inspiration to mix it up.
Try big polka dots with striped bottoms. Source.
Take black & white and pair it with a super bold and multi-colored print. Source.
Pull one solid color out of a multi-colored top and pair with a fun animal print. Source.