Viewing Styles Applied to a Tag
For HTML, XHTML, JSP, JSPX files, IntelliJ IDEA suggests a way to explore all styles applied to an arbitrary tag.
The results for each tag are displayed in the dedicated tabs of the CSS Styles tool window. Using this tool window, you can view the list of styles applied to a tag, and the definition of these styles. Besides that, you can navigate from style to the corresponding tag in the source code.