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                Highlighting of HTML Tag Tree
Since version 2.1, WebStorm & PhpStorm both come with a new code highlighting feature. It makes it easier to work with big and complex HTML files, with deep nested tags structure:

Please note that highlighting is only activated when there is more than one tag with the same name in the hierarchy.
By default, only 6 parent tags are highlighted with 6 different colors. You can change the depth to highlight or completely disable the feature in Settings | Editor | Appearance | Enable HTML tag tree highlighting.
Also you can tweak the colors in Settings | Editor | Colors & Fonts | HTML.
Download WebStorm (or PhpStorm, if you use PHP) and try!
 
                                                                                                 
                 
                                                     
                