Readability of Folders in the Sidebar

This is just a suggestion for sidebar readability. The addition of channel folders was excellent, but I think that it would be helpful if they were color-coded when open as well as when minimized.

Folders can be custom-colored to show a background color when minimized, but when opened, this goes away and the background becomes gray, making channels within one folder difficult to distinguish from channels from another.

I have included two pictures, one of my folders minimized and one with a folder expanded.