My Motion 5 project suddenly turned black and white.

I was just adding some text and going about my business in my Motion 5 file, but when I went back and looked at some pictures that I added earlier in the project, they have all turned black and white. I probably clicked something along the way, but being a beginner, I have no idea which button I accidentally clicked to turn the media grey... I've spent some time on this project, so hopefully I won't have to go back and start fresh.