Answered
Workspace/interface turned white, it will not change back to grey in preferences interface panel.
In Illustrator (most recent up to date version), I did a shortcut and accidentally turned my workspace to white. I went to preferences ->user interface ->brightness and changed the color. It changes the interface except for the workspace color, it remains white. However; if I open a new document it does change to the appropriate color. I just don't want to copy and paste all my work to a new document. This happened at work on a PC. When I brought the file home I opened it on a IMAC with the same issue.
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