bootstrap-paragraphs.php

    // If the paragraph type has got a background color field.
    if (isset($element['subform']['bp_background']) && isset($element['subform']['bp_background']['widget'])) {
      $configFactory = \Drupal::configFactory()->getEditable('varbase_bootstrap_paragraphs.settings');
      $background_colors = $configFactory->get('background_colors');

      $background_colors_options = ['_none' => t('N/A')];
      $lines = explode(PHP_EOL, $background_colors);
      foreach($lines as $line) {
        $line = explode('|', $line);
        $background_colors_options[$line[0]] = $line[1];
      }

      // Updated the bp_background options with the list of vbp colors.
      $element['subform']['bp_background']['widget']['#options'] = $background_colors_options;