Remove Border around uploaded images

How would I remove the border (colour #eee) from my images?

Saids the file is index but I cannot find it via ftp.

Many thanks in advance

 

Hi imogen!

Please paste the code given below in Custom CSS section
(Appearance -> Theme Options -> Styling Options -> Custom CSS) of your dashboard.

Code:

.page_content .fullwidth img {
border:none !important;
}

Thanks,
Praveen