If you look at the red box, you'll notice a button which takes you to another screen where you can customize the look of the message board. I've created neutral backgrounds that you can choose from and a few other customizations as well.

This looks great ....but on my tablet I don't have a button ....but sounds cool ...!!!

@Doreensfree, I have it on my kindle. If you're using the mobile site its still top right, just on the left of the three bars 😊 

 

Thanks Jillar ...I've found it .......my toggle ....