I am doing a cleanup of my previous sharepoint custom styling, and the developer has mixed custom styles with out of the box styles without properly labeling which is custom. I want to be able to distinguish between custom and out of the box css selectors. But I am not sure how. I looked at the core15.css but just because something is not there, doesn't mean that SharePoint is not using it. For example
.ms-WPBody is used on web parts, but is not shown in the core15.css.
Does anyone know if there is a full list somewhere of out of the box styles?