Is there any way to set the no-tile background colour from grey?

Is there any way to set the no-tile background colour from grey?

Thanks. How did you find/know that? I looked in the dev tools but didn’t see any colours defined 
OOo, very nice. I’ll have to be more persistent next time. Cheers again!
The element selector in google chrome (ctrl+shift+c) work better than on the igntion external debugger. It can find nested elements way better. I always use it there.
(tho in this case it didnt make much of a difference)