@YouTube @TeamYouTube did you guys disabled the dark theme on some or all web browser users? Because as of yesterday, I no longer have the dark theme on Google Chrome (running on Windows 10 Enterprise)
That's strange. Have you tried clearing the browser's cache & cookies to see if that fixes the issue? Here's how: https://goo.gl/e2dYZt . Also, try using a different browser or Incognito mode to check if that makes any difference.