Noob Question: Transparent Live Tiles WP 8.1

Hey everyone,

I did some Googling and some Binging just a minute ago about this, but I couldn't find my answer.

How do I disable transparent live tiles in WP 8.1? I'm changing up my start screen, and I want to do it without the distraction of a background image. I may go back to transparent tiles once I get the arrangement figured out, but I need everything to be a standard live tile now.

I've been looking through system settings and individual app settings, but I'm not having any luck. I've still got 7-8 live tiles that are transparent.

Thanks in advance for your assistance!