change look of quote in editor

[metulburr]

I would like to darken the quote within the editor. The reason for this is new users do not realize they are putting their post inside the quote tag such as the image attached. And this is happening quite often. 

So is there a way to darken within the quote box within the editor, as to give users the knowledge that they are posting their response inside or outside the quote box.

Inpecting the html i get

<blockquote data-pid="2332" data-dateline="1476190880"><cite>  wavic</cite>TEXT HERE<br></blockquote>

but blockquote in CSS is for the look of it on the postbit...not within the editor