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function wpb_add_inline_css() {

   function hex2rgb($hex) {
      $hex = str_replace("#", "", $hex);

      if(strlen($hex) == 3) {
         $r = hexdec($hex[0].$hex[0]);
         $g = hexdec($hex[1].$hex[1]);
         $b = hexdec($hex[2].$hex[2]);
      } else {
         $r = hexdec($hex[0].$hex[1]);
         $g = hexdec($hex[2].$hex[3]);
         $b = hexdec($hex[4].$hex[5]);
      }

      return $r. ",". + $g. ",".  + $b;
   }
   $colorRGB = hex2rgb($colorRGBraw);