Hello Container folk!!

I usually hang out on the tropical or plant exchange forum. I am growing my tomatoes in my version of earth boxes. I have a container from Tidy cats litter in a container from Tidy cats litter. My husband feels these large garish yellow containers spoil the effects in our garden. I was wondering if I could cover them with weed cloth. I know I could have painted them with that new plastic paint but now with the plants already in place I'd be afraid to get spray paint on them. Also I'm in the subtropics so I don't want to cover them with anything that might increase the heat too much if that's a problem.

If you need photos, I can post them.

Suggestions of what to cover these with will be very welcome.