Find out who overrides a class in IE Developer Tools

Question

I'm using IE developer toolbar to analyze the DOM. My question is: when you check a certain element, let's say a paragraph, and that paragraph has a class that will set its background-color, but for some reason that class is overridden by another class or whatever, the class with that specific rule is strike through. How can I find out what class or parent element overrides it?

Example:

How can I find out whom overrides this background-color?

Answer 1

You can find it in Computed—background-color (need to expand it) in IE 11 Developer Tools:

Or try to search it this way in Chrome DevTools: