Changing art board background globally

[softsound]

Is there a way I can do this globally? I decided that adding a colored background to my 20 artboards would make it easier to see. I just did a bunch of logo mock-ups and wanted to see if there was a faster way to handle this. I didn't really notice any way to easily change the BG on all the boards so I created a symbol and slowly duplicated and dragged it from board to board and had to redo all my layers to make sure it actually was at the bottom of the board on the correct board but if there is a faster way to handle this I'd be happy to hear it for the future.

[firstdefence]

You should be able to just select the Artboards en masse and go to the colour or swatches panel and change the background of the artboard by selecting a colour.

Note: using gradients will use the area of both Artboards as can be seen in the video.