How to write paragraph template to add tags and css classes?
Have a look here for the naming


  The default paragraphs template is in paragraphs-item.tpl.php. It uses
  theme suggestions for other templates, the following suggestions are
  available:
  
  
  paragraphs__[view_mode] (e.g. paragraphs--default.tpl.php)
  paragraphs__[type] (e.g. paragraphs--image.tpl.php)
  paragraphs__[type]__[view_mode] (e.g. paragraphs--image--default.tpl.php)
  


As this seems to be wrong .. Try the suggestion:

paragraphs-items--pr_bg_font_clr.tpl.php
paragraphs-item--pr_bg_font_clr.tpl.php