Can you change the grey canvas behind the background?

I would like an alternative to the canvas-like pattern. Maybe with a bookmarklet? I suspect the answer is no, but my google-fu failed.

Might be able to do something with the Stylus browser extension.  I've never used it, but I know there is a thread on that extension and some Roll20 specific ways to use it somewhere here on the forums.

Using the Stylus installation instructions in the top post of either of these threads... Show Off Your Style , and Show Off Your Style 2: The Stylening! install this style... body { &nbsp; &nbsp; background-color:#000 !important; &nbsp; &nbsp; background:none; } And for the websites affected, make sure you choose "URLs matching the regexp": <a href="https://app.roll20.net/editor/" rel="nofollow">https://app.roll20.net/editor/</a> Don't worry, it'e easier than it looks. Just follow the instructions. The style above removes the linen pattern and replaces it with black. You can edit the #000 and replace it with any rgb color you choose. If you want an image in there, delete the line that says background-color:#000 !important; , and change the other line to .background:url(ADDRESSOFURLTOUSE);