How to print paragraphs in twig template?
Not sure if it's possible with your current approach. Here is how I would approach this.

In your node template file just do a {{ content.field_pr }}

Create a template file for your paragraph.


  paragraph__[view_mode] (e.g. paragraph--default.html.twig)
  
  paragraph__[type] (e.g. paragraph--image.html.twig)
  
  paragraph__[type]__[view_mode] (e.g.
  paragraph--image--default.html.twig)
  
  source: Theming in Paragraphs for Drupal 8


In paragraph--[type].html.twig you do {{ content.field_text }} and {{ content.field_color }}