floor exercise mat colors

Was watching one of my favorite floor routines and released how yellow the floor mat was. Hit me that I had never remembered seeing a yellow floor mat. Then, of course, I tried to remember the different colored floor exercise mats I've seen. Generally I think of floor mats as blue.

What are the different colors you've seen?

Is there an official rule about floor exercise colors?

I see a future of sponsors or designs on the actual floor mats themselves.

https://www.youtube.com/watch?v=XeIqPqSVXdY Yellow

https://www.youtube.com/watch?v=rH-VBHvxNuE Pink

https://www.youtube.com/watch?v=WPrV6GwS7Ss white mat

floor exercise mat colors