diff --git a/src/Element/Styles.php b/src/Element/Styles.php
index 1368889eb4aaf24f9892238a3ccf3b21c116c0c4..62a7cf83f8a11991f745a631209ae361d1ab2719 100644
--- a/src/Element/Styles.php
+++ b/src/Element/Styles.php
@@ -118,7 +118,7 @@ class Styles extends FormElementBase {
     $sourceManager = static::sourceManager();
     $selected = $element['#default_value']['selected'] ?? [];
     $extra = $element['#default_value']['extra'] ?? '';
-    $suffix = ' (' . \t('used') . ')';
+    $suffix = static::getAppliedSuffix();
     $multipleGroups = (\count($groupedPluginDefinitions) == 1) ? FALSE : TRUE;
     // Open the root details if specified or if a child has an error.
     $open = (!empty($element['#open']) || !empty($element['#children_errors'])) ? TRUE : FALSE;
@@ -243,6 +243,16 @@ class Styles extends FormElementBase {
     return $transliterated ?? '';
   }
 
+  /**
+   * Get the suffix to indicate a style is applied.
+   *
+   * @return string
+   *   The "applied" suffix.
+   */
+  protected static function getAppliedSuffix(): string {
+    return ' <sup>(<mark>' . \t('applied') . '</mark>)</sup>';
+  }
+
   /**
    * Get selected styles from form values.
    *
diff --git a/src/StylePluginManager.php b/src/StylePluginManager.php
index 1b00a082f2df06f8648dfb2315ca37bc82ff4abd..44c5906d740a51b0bbde3de6332799a7bd40a34f 100644
--- a/src/StylePluginManager.php
+++ b/src/StylePluginManager.php
@@ -253,7 +253,7 @@ class StylePluginManager extends DefaultPluginManager implements StylePluginMana
     if (\count($grouped_plugin_definitions) == 1) {
       $multiple_groups = FALSE;
     }
-    $suffix = ' (' . $this->t('used') . ')';
+    $suffix = ' <sup>(<mark>' . $this->t('applied') . '</mark>)</sup>';
     $global_used = $extra;
     foreach ($grouped_plugin_definitions as $group_plugin_definitions) {
       $group_used = FALSE;
diff --git a/tests/src/Unit/StylePluginManagerTest.php b/tests/src/Unit/StylePluginManagerTest.php
index ca24911dd6415895e681fd25f204518e5719349f..23d47300f46c776ce7dc26cd12c8fa3d414b7a74 100644
--- a/tests/src/Unit/StylePluginManagerTest.php
+++ b/tests/src/Unit/StylePluginManagerTest.php
@@ -403,7 +403,6 @@ class StylePluginManagerTest extends UnitTestCase {
    * @covers ::alterForm
    */
   public function testAlterForm(): void {
-    $suffix = ' (used)';
     $form = [
       '#type' => 'details',
       '#title' => 'Main',
@@ -421,10 +420,10 @@ class StylePluginManagerTest extends UnitTestCase {
     $this->assertSame('opt2', $altered_form['ui_styles_test1']['#default_value']);
     $this->assertSame('opt3', $altered_form['ui_styles_test2']['#default_value']);
     $this->assertSame($this->styles[0]['options'], $altered_form['ui_styles_test1']['#options']);
-    $this->assertSame($this->styles[0]['label'] . $suffix, $altered_form['ui_styles_test1']['#title']);
+    $this->assertSame($this->styles[0]['label'] . StylesElementTest::APPLIED_SUFFIX, $altered_form['ui_styles_test1']['#title']);
     $this->assertSame($this->styles[1]['options'], $altered_form['ui_styles_test2']['#options']);
-    $this->assertSame($this->styles[1]['label'] . $suffix, $altered_form['ui_styles_test2']['#title']);
-    $this->assertSame('Main' . $suffix, $altered_form['#title']);
+    $this->assertSame($this->styles[1]['label'] . StylesElementTest::APPLIED_SUFFIX, $altered_form['ui_styles_test2']['#title']);
+    $this->assertSame('Main' . StylesElementTest::APPLIED_SUFFIX, $altered_form['#title']);
 
     // Test that if no value is used suffix is not set.
     // @phpstan-ignore-next-line
@@ -438,12 +437,11 @@ class StylePluginManagerTest extends UnitTestCase {
   }
 
   /**
-   * Test if used suffix is correctly placed.
+   * Test if applied suffix is correctly placed.
    *
    * @covers ::alterForm
    */
-  public function testUsedSuffix(): void {
-    $suffix = ' (used)';
+  public function testAppliedSuffix(): void {
     $form = [
       '#type' => 'details',
       '#title' => 'Main',
@@ -486,8 +484,8 @@ class StylePluginManagerTest extends UnitTestCase {
     ], '');
     $this->assertArrayHasKey('ui_styles_test1', $altered_form);
     $this->assertArrayHasKey('ui_styles_test2', $altered_form);
-    $this->assertSame('Main' . $suffix, $altered_form['#title']);
-    $this->assertSame($this->styles[0]['label'] . $suffix, $altered_form['ui_styles_test1']['#title']);
+    $this->assertSame('Main' . StylesElementTest::APPLIED_SUFFIX, $altered_form['#title']);
+    $this->assertSame($this->styles[0]['label'] . StylesElementTest::APPLIED_SUFFIX, $altered_form['ui_styles_test1']['#title']);
     $this->assertSame($this->styles[1]['label'], $altered_form['ui_styles_test2']['#title']);
 
     // Value on test2.
@@ -498,9 +496,9 @@ class StylePluginManagerTest extends UnitTestCase {
     ], '');
     $this->assertArrayHasKey('ui_styles_test1', $altered_form);
     $this->assertArrayHasKey('ui_styles_test2', $altered_form);
-    $this->assertSame('Main' . $suffix, $altered_form['#title']);
+    $this->assertSame('Main' . StylesElementTest::APPLIED_SUFFIX, $altered_form['#title']);
     $this->assertSame($this->styles[0]['label'], $altered_form['ui_styles_test1']['#title']);
-    $this->assertSame($this->styles[1]['label'] . $suffix, $altered_form['ui_styles_test2']['#title']);
+    $this->assertSame($this->styles[1]['label'] . StylesElementTest::APPLIED_SUFFIX, $altered_form['ui_styles_test2']['#title']);
 
     // Value on extra.
     // @phpstan-ignore-next-line
@@ -510,7 +508,7 @@ class StylePluginManagerTest extends UnitTestCase {
     ], 'extra');
     $this->assertArrayHasKey('ui_styles_test1', $altered_form);
     $this->assertArrayHasKey('ui_styles_test2', $altered_form);
-    $this->assertSame('Main' . $suffix, $altered_form['#title']);
+    $this->assertSame('Main' . StylesElementTest::APPLIED_SUFFIX, $altered_form['#title']);
     $this->assertSame($this->styles[0]['label'], $altered_form['ui_styles_test1']['#title']);
     $this->assertSame($this->styles[1]['label'], $altered_form['ui_styles_test2']['#title']);
 
@@ -556,10 +554,10 @@ class StylePluginManagerTest extends UnitTestCase {
     $this->assertArrayHasKey('main_2', $altered_form);
     $this->assertArrayHasKey('ui_styles_test1', $altered_form['main']);
     $this->assertArrayHasKey('ui_styles_test2', $altered_form['main_2']);
-    $this->assertSame('Main' . $suffix, $altered_form['#title']);
-    $this->assertSame('Main' . $suffix, $altered_form['main']['#title']);
+    $this->assertSame('Main' . StylesElementTest::APPLIED_SUFFIX, $altered_form['#title']);
+    $this->assertSame('Main' . StylesElementTest::APPLIED_SUFFIX, $altered_form['main']['#title']);
     $this->assertSame('Main 2', $altered_form['main_2']['#title']);
-    $this->assertSame($this->styles[0]['label'] . $suffix, $altered_form['main']['ui_styles_test1']['#title']);
+    $this->assertSame($this->styles[0]['label'] . StylesElementTest::APPLIED_SUFFIX, $altered_form['main']['ui_styles_test1']['#title']);
     $this->assertSame($this->styles[1]['label'], $altered_form['main_2']['ui_styles_test2']['#title']);
 
     // Value on test2.
@@ -572,11 +570,11 @@ class StylePluginManagerTest extends UnitTestCase {
     $this->assertArrayHasKey('main_2', $altered_form);
     $this->assertArrayHasKey('ui_styles_test1', $altered_form['main']);
     $this->assertArrayHasKey('ui_styles_test2', $altered_form['main_2']);
-    $this->assertSame('Main' . $suffix, $altered_form['#title']);
+    $this->assertSame('Main' . StylesElementTest::APPLIED_SUFFIX, $altered_form['#title']);
     $this->assertSame('Main', $altered_form['main']['#title']);
-    $this->assertSame('Main 2' . $suffix, $altered_form['main_2']['#title']);
+    $this->assertSame('Main 2' . StylesElementTest::APPLIED_SUFFIX, $altered_form['main_2']['#title']);
     $this->assertSame($this->styles[0]['label'], $altered_form['main']['ui_styles_test1']['#title']);
-    $this->assertSame($this->styles[1]['label'] . $suffix, $altered_form['main_2']['ui_styles_test2']['#title']);
+    $this->assertSame($this->styles[1]['label'] . StylesElementTest::APPLIED_SUFFIX, $altered_form['main_2']['ui_styles_test2']['#title']);
 
     // Value on extra.
     // @phpstan-ignore-next-line
@@ -588,7 +586,7 @@ class StylePluginManagerTest extends UnitTestCase {
     $this->assertArrayHasKey('main_2', $altered_form);
     $this->assertArrayHasKey('ui_styles_test1', $altered_form['main']);
     $this->assertArrayHasKey('ui_styles_test2', $altered_form['main_2']);
-    $this->assertSame('Main' . $suffix, $altered_form['#title']);
+    $this->assertSame('Main' . StylesElementTest::APPLIED_SUFFIX, $altered_form['#title']);
     $this->assertSame('Main', $altered_form['main']['#title']);
     $this->assertSame('Main 2', $altered_form['main_2']['#title']);
     $this->assertSame($this->styles[0]['label'], $altered_form['main']['ui_styles_test1']['#title']);
diff --git a/tests/src/Unit/StylesElementTest.php b/tests/src/Unit/StylesElementTest.php
index 11d4bdb1695edad1332f1ebd486f61b298a2aa2b..9902bc28862eda2e07214875eb7a66679f78c1f2 100644
--- a/tests/src/Unit/StylesElementTest.php
+++ b/tests/src/Unit/StylesElementTest.php
@@ -24,6 +24,8 @@ use Symfony\Component\DependencyInjection\ContainerBuilder;
  */
 class StylesElementTest extends UnitTestCase {
 
+  public const APPLIED_SUFFIX = ' <sup>(<mark>applied</mark>)</sup>';
+
   /**
    * A list of styles definitions.
    *
@@ -122,7 +124,6 @@ class StylesElementTest extends UnitTestCase {
    * @covers ::buildForm
    */
   public function testBuildForm(): void {
-    $suffix = ' (used)';
     $formState = new FormState();
     $completeForm = [];
 
@@ -144,10 +145,10 @@ class StylesElementTest extends UnitTestCase {
     $this->assertSame('opt2', $processedElement['wrapper']['ui_styles_test1']['#default_value']);
     $this->assertSame('opt3', $processedElement['wrapper']['ui_styles_test2']['#default_value']);
     $this->assertSame($this->styles[0]['options'], $processedElement['wrapper']['ui_styles_test1']['#options']);
-    $this->assertSame($this->styles[0]['label'] . $suffix, $processedElement['wrapper']['ui_styles_test1']['#title']);
+    $this->assertSame($this->styles[0]['label'] . static::APPLIED_SUFFIX, $processedElement['wrapper']['ui_styles_test1']['#title']);
     $this->assertSame($this->styles[1]['options'], $processedElement['wrapper']['ui_styles_test2']['#options']);
-    $this->assertSame($this->styles[1]['label'] . $suffix, $processedElement['wrapper']['ui_styles_test2']['#title']);
-    $this->assertSame('Main' . $suffix, $processedElement['wrapper']['#title']);
+    $this->assertSame($this->styles[1]['label'] . static::APPLIED_SUFFIX, $processedElement['wrapper']['ui_styles_test2']['#title']);
+    $this->assertSame('Main' . static::APPLIED_SUFFIX, $processedElement['wrapper']['#title']);
 
     // Test that if no value is used suffix is not set.
     $element = [
@@ -164,12 +165,12 @@ class StylesElementTest extends UnitTestCase {
   }
 
   /**
-   * Test if used suffix is correctly placed.
+   * Test if applied suffix is correctly placed.
    *
    * @covers ::buildForm
+   * @covers ::getAppliedSuffix
    */
-  public function testUsedSuffix(): void {
-    $suffix = ' (used)';
+  public function testAppliedSuffix(): void {
     $formState = new FormState();
     $completeForm = [];
     /** @var \Drupal\ui_styles_test\DummyStylePluginManager $stylesManager */
@@ -223,8 +224,8 @@ class StylesElementTest extends UnitTestCase {
     $processedElement = Styles::buildForm($element, $formState, $completeForm);
     $this->assertArrayHasKey('ui_styles_test1', $processedElement['wrapper']);
     $this->assertArrayHasKey('ui_styles_test2', $processedElement['wrapper']);
-    $this->assertSame('Main' . $suffix, $processedElement['wrapper']['#title']);
-    $this->assertSame($this->styles[0]['label'] . $suffix, $processedElement['wrapper']['ui_styles_test1']['#title']);
+    $this->assertSame('Main' . static::APPLIED_SUFFIX, $processedElement['wrapper']['#title']);
+    $this->assertSame($this->styles[0]['label'] . static::APPLIED_SUFFIX, $processedElement['wrapper']['ui_styles_test1']['#title']);
     $this->assertSame($this->styles[1]['label'], $processedElement['wrapper']['ui_styles_test2']['#title']);
 
     // Value on test2.
@@ -241,9 +242,9 @@ class StylesElementTest extends UnitTestCase {
     $processedElement = Styles::buildForm($element, $formState, $completeForm);
     $this->assertArrayHasKey('ui_styles_test1', $processedElement['wrapper']);
     $this->assertArrayHasKey('ui_styles_test2', $processedElement['wrapper']);
-    $this->assertSame('Main' . $suffix, $processedElement['wrapper']['#title']);
+    $this->assertSame('Main' . static::APPLIED_SUFFIX, $processedElement['wrapper']['#title']);
     $this->assertSame($this->styles[0]['label'], $processedElement['wrapper']['ui_styles_test1']['#title']);
-    $this->assertSame($this->styles[1]['label'] . $suffix, $processedElement['wrapper']['ui_styles_test2']['#title']);
+    $this->assertSame($this->styles[1]['label'] . static::APPLIED_SUFFIX, $processedElement['wrapper']['ui_styles_test2']['#title']);
 
     // Value on extra.
     $element = [
@@ -260,7 +261,7 @@ class StylesElementTest extends UnitTestCase {
     $processedElement = Styles::buildForm($element, $formState, $completeForm);
     $this->assertArrayHasKey('ui_styles_test1', $processedElement['wrapper']);
     $this->assertArrayHasKey('ui_styles_test2', $processedElement['wrapper']);
-    $this->assertSame('Main' . $suffix, $processedElement['wrapper']['#title']);
+    $this->assertSame('Main' . static::APPLIED_SUFFIX, $processedElement['wrapper']['#title']);
     $this->assertSame($this->styles[0]['label'], $processedElement['wrapper']['ui_styles_test1']['#title']);
     $this->assertSame($this->styles[1]['label'], $processedElement['wrapper']['ui_styles_test2']['#title']);
 
@@ -318,10 +319,10 @@ class StylesElementTest extends UnitTestCase {
     $this->assertArrayHasKey('main_2', $processedElement['wrapper']);
     $this->assertArrayHasKey('ui_styles_test1', $processedElement['wrapper']['main']);
     $this->assertArrayHasKey('ui_styles_test2', $processedElement['wrapper']['main_2']);
-    $this->assertSame('Main' . $suffix, $processedElement['wrapper']['#title']);
-    $this->assertSame('Main' . $suffix, $processedElement['wrapper']['main']['#title']);
+    $this->assertSame('Main' . static::APPLIED_SUFFIX, $processedElement['wrapper']['#title']);
+    $this->assertSame('Main' . static::APPLIED_SUFFIX, $processedElement['wrapper']['main']['#title']);
     $this->assertSame('Main 2', $processedElement['wrapper']['main_2']['#title']);
-    $this->assertSame($this->styles[0]['label'] . $suffix, $processedElement['wrapper']['main']['ui_styles_test1']['#title']);
+    $this->assertSame($this->styles[0]['label'] . static::APPLIED_SUFFIX, $processedElement['wrapper']['main']['ui_styles_test1']['#title']);
     $this->assertSame($this->styles[1]['label'], $processedElement['wrapper']['main_2']['ui_styles_test2']['#title']);
 
     // Value on test2.
@@ -340,11 +341,11 @@ class StylesElementTest extends UnitTestCase {
     $this->assertArrayHasKey('main_2', $processedElement['wrapper']);
     $this->assertArrayHasKey('ui_styles_test1', $processedElement['wrapper']['main']);
     $this->assertArrayHasKey('ui_styles_test2', $processedElement['wrapper']['main_2']);
-    $this->assertSame('Main' . $suffix, $processedElement['wrapper']['#title']);
+    $this->assertSame('Main' . static::APPLIED_SUFFIX, $processedElement['wrapper']['#title']);
     $this->assertSame('Main', $processedElement['wrapper']['main']['#title']);
-    $this->assertSame('Main 2' . $suffix, $processedElement['wrapper']['main_2']['#title']);
+    $this->assertSame('Main 2' . static::APPLIED_SUFFIX, $processedElement['wrapper']['main_2']['#title']);
     $this->assertSame($this->styles[0]['label'], $processedElement['wrapper']['main']['ui_styles_test1']['#title']);
-    $this->assertSame($this->styles[1]['label'] . $suffix, $processedElement['wrapper']['main_2']['ui_styles_test2']['#title']);
+    $this->assertSame($this->styles[1]['label'] . static::APPLIED_SUFFIX, $processedElement['wrapper']['main_2']['ui_styles_test2']['#title']);
 
     // Value on extra.
     $element = [
@@ -363,7 +364,7 @@ class StylesElementTest extends UnitTestCase {
     $this->assertArrayHasKey('main_2', $processedElement['wrapper']);
     $this->assertArrayHasKey('ui_styles_test1', $processedElement['wrapper']['main']);
     $this->assertArrayHasKey('ui_styles_test2', $processedElement['wrapper']['main_2']);
-    $this->assertSame('Main' . $suffix, $processedElement['wrapper']['#title']);
+    $this->assertSame('Main' . static::APPLIED_SUFFIX, $processedElement['wrapper']['#title']);
     $this->assertSame('Main', $processedElement['wrapper']['main']['#title']);
     $this->assertSame('Main 2', $processedElement['wrapper']['main_2']['#title']);
     $this->assertSame($this->styles[0]['label'], $processedElement['wrapper']['main']['ui_styles_test1']['#title']);