It mostly works great and I love that I can customize the colors however I want. However, customizing the colors occasionally causes that section to completely disappear from the settings until I reset the colors back to default, which is incredibly annoying.

Another issue is that some icons on Canvas (like the black download icon or the black hyperlink icon) don't seem to allow for customization via this extension, causing them to blend into the background if you attempt to use a dark background.