Issue #3510676 by f0ns: Issue with Copy Button Background Color in the settings form

src/Form/HighlightJsSettingsForm.php

@@ -79,7 +79,7 @@ class HighlightJsSettingsForm extends ConfigFormBase {
     $form['copy_btn_config']['copy_bg_color'] = [
       '#type' => 'color',
       '#title' => $this->t('Copy Button Background Color'),
-      '#default_value' => $config->get('copy_bg_transparent') ?: '#4CAF50',
+      '#default_value' => $config->get('copy_bg_color') ?: '#4CAF50',
       '#description' => $this->t('Choose a background color for the "Copy" button.'),
       '#states' => [
         'visible' => [
@@ -137,12 +137,12 @@ class HighlightJsSettingsForm extends ConfigFormBase {
     ];
 
     $roles = Role::loadMultiple();
-    $options = array();
+    $options = [];
     foreach ($roles as $rid => $role) {
       $options[$rid] = $role->label();
     }
 
-    $form['copy_btn_config']['role_copy_access'] = array(
+    $form['copy_btn_config']['role_copy_access'] = [
       '#type' => 'checkboxes',
       '#title' => $this->t('User Roles'),
       '#options' => $options,
@@ -153,7 +153,7 @@ class HighlightJsSettingsForm extends ConfigFormBase {
           ':input[name="copy_enable"]' => ['checked' => TRUE],
         ],
       ],
-    );
+    ];
 
     $form['theme'] = [
       '#type' => 'select',