Are you fed up with white background of youtube. If your using Google Chrome browser then it is very simple to change the background color of youtube. Simply follow these steps
1. Open your Google Chrome browser
2. Click here to download Youtube styler
3. After downloading install it which automatically installs as an extensions to your chrome browser
4. you can see youtube styler extension near address bar which you can see clearly in below picture
5. Right click on it and select options
6. In a new tab it opens youtube styler options with multi colors, double click on any color
7. Open Youtube.com in new tab and you can see change in background color you can clearly see the difference between before and after using this extension in below pictures,
1. Open your Google Chrome browser
2. Click here to download Youtube styler
3. After downloading install it which automatically installs as an extensions to your chrome browser
4. you can see youtube styler extension near address bar which you can see clearly in below picture
6. In a new tab it opens youtube styler options with multi colors, double click on any color
7. Open Youtube.com in new tab and you can see change in background color you can clearly see the difference between before and after using this extension in below pictures,
before installing youtube styler
after installing youtube styler
Go to this link if you want a clear demo 
