diff --git a/pkg/analysis_server/doc/api.html b/pkg/analysis_server/doc/api.html
index 3bea13f57c6..338d07b6144 100644
--- a/pkg/analysis_server/doc/api.html
+++ b/pkg/analysis_server/doc/api.html
@@ -4791,7 +4791,7 @@ a:focus, a:hover {
       </dd><dt class="value">METHOD_STATIC</dt><dd>
         
         <p>Deprecated - no longer sent.</p>
-      </dd><dt class="value">PARAMETER</dt><dd>
+      </dd><dt class="value">MIXIN</dt><dt class="value">PARAMETER</dt><dd>
         
         <p>Deprecated - no longer sent.</p>
       </dd><dt class="value">SETTER_DECLARATION</dt><dd>
diff --git a/pkg/analysis_server/lib/src/computer/computer_highlights.dart b/pkg/analysis_server/lib/src/computer/computer_highlights.dart
index 084f22e3513..465839e7f92 100644
--- a/pkg/analysis_server/lib/src/computer/computer_highlights.dart
+++ b/pkg/analysis_server/lib/src/computer/computer_highlights.dart
@@ -1146,6 +1146,7 @@ class _DartUnitHighlightsComputerVisitor extends RecursiveAstVisitor<void> {
   void visitMixinDeclaration(MixinDeclaration node) {
     computer._addRegion_token(node.baseKeyword, HighlightRegionType.BUILT_IN);
     computer._addRegion_token(node.mixinKeyword, HighlightRegionType.BUILT_IN);
+    computer._addRegion_token(node.name, HighlightRegionType.MIXIN);
     super.visitMixinDeclaration(node);
   }
 
diff --git a/pkg/analysis_server/test/analysis/notification_highlights2_test.dart b/pkg/analysis_server/test/analysis/notification_highlights2_test.dart
index f42b259185c..88f1a456b25 100644
--- a/pkg/analysis_server/test/analysis/notification_highlights2_test.dart
+++ b/pkg/analysis_server/test/analysis/notification_highlights2_test.dart
@@ -1433,14 +1433,6 @@ class C {
     assertHasRegion(HighlightRegionType.KEYWORD, 'late');
   }
 
-  Future<void> test_KEYWORD_mixin() async {
-    addTestFile('''
-mixin M {}
-''');
-    await prepareHighlights();
-    assertHasRegion(HighlightRegionType.BUILT_IN, 'mixin');
-  }
-
   Future<void> test_KEYWORD_required() async {
     addTestFile('''
 void f({required int x}) {}
@@ -1590,6 +1582,33 @@ void f(p) {
     assertHasRegion(HighlightRegionType.INSTANCE_METHOD_REFERENCE, 'add(null)');
   }
 
+  Future<void> test_mixin() async {
+    var testCode = TestCode.parse(r'''
+mixin M on int {}
+''');
+    addTestFile(testCode.code);
+    await prepareHighlights();
+    assertHighlightText(testCode, -1, r'''
+0 + 5 |mixin| BUILT_IN
+6 + 1 |M| MIXIN
+8 + 2 |on| BUILT_IN
+11 + 3 |int| CLASS
+''');
+  }
+
+  Future<void> test_mixin_base() async {
+    var testCode = TestCode.parse(r'''
+base mixin M {}
+''');
+    addTestFile(testCode.code);
+    await prepareHighlights();
+    assertHighlightText(testCode, -1, r'''
+0 + 4 |base| BUILT_IN
+5 + 5 |mixin| BUILT_IN
+11 + 1 |M| MIXIN
+''');
+  }
+
   Future<void> test_namedExpression_namedParameter() async {
     addTestFile('''
 void f({int a}) {}
diff --git a/pkg/analysis_server/test/integration/support/protocol_matchers.dart b/pkg/analysis_server/test/integration/support/protocol_matchers.dart
index d9f6da6768e..9c9c12d8b1e 100644
--- a/pkg/analysis_server/test/integration/support/protocol_matchers.dart
+++ b/pkg/analysis_server/test/integration/support/protocol_matchers.dart
@@ -843,6 +843,7 @@ final Matcher isHighlightRegion = LazyMatcher(() => MatchesJsonObject(
 ///   METHOD_DECLARATION
 ///   METHOD_DECLARATION_STATIC
 ///   METHOD_STATIC
+///   MIXIN
 ///   PARAMETER
 ///   SETTER_DECLARATION
 ///   TOP_LEVEL_VARIABLE
@@ -926,6 +927,7 @@ final Matcher isHighlightRegionType = MatchesEnum('HighlightRegionType', [
   'METHOD_DECLARATION',
   'METHOD_DECLARATION_STATIC',
   'METHOD_STATIC',
+  'MIXIN',
   'PARAMETER',
   'SETTER_DECLARATION',
   'TOP_LEVEL_VARIABLE',
diff --git a/pkg/analysis_server/tool/spec/generated/java/types/HighlightRegionType.java b/pkg/analysis_server/tool/spec/generated/java/types/HighlightRegionType.java
index d6ab3ef3b55..56cdb49c97f 100644
--- a/pkg/analysis_server/tool/spec/generated/java/types/HighlightRegionType.java
+++ b/pkg/analysis_server/tool/spec/generated/java/types/HighlightRegionType.java
@@ -158,6 +158,8 @@ public class HighlightRegionType {
    */
   public static final String METHOD_STATIC = "METHOD_STATIC";
 
+  public static final String MIXIN = "MIXIN";
+
   /**
    * Deprecated - no longer sent.
    */
diff --git a/pkg/analysis_server_client/lib/src/protocol/protocol_common.dart b/pkg/analysis_server_client/lib/src/protocol/protocol_common.dart
index 01225fef6cd..877607aa55e 100644
--- a/pkg/analysis_server_client/lib/src/protocol/protocol_common.dart
+++ b/pkg/analysis_server_client/lib/src/protocol/protocol_common.dart
@@ -1935,6 +1935,7 @@ class HighlightRegion implements HasToJson {
 ///   METHOD_DECLARATION
 ///   METHOD_DECLARATION_STATIC
 ///   METHOD_STATIC
+///   MIXIN
 ///   PARAMETER
 ///   SETTER_DECLARATION
 ///   TOP_LEVEL_VARIABLE
@@ -2133,6 +2134,8 @@ class HighlightRegionType implements Enum {
   static const HighlightRegionType METHOD_STATIC =
       HighlightRegionType._('METHOD_STATIC');
 
+  static const HighlightRegionType MIXIN = HighlightRegionType._('MIXIN');
+
   /// Deprecated - no longer sent.
   static const HighlightRegionType PARAMETER =
       HighlightRegionType._('PARAMETER');
@@ -2271,6 +2274,7 @@ class HighlightRegionType implements Enum {
     METHOD_DECLARATION,
     METHOD_DECLARATION_STATIC,
     METHOD_STATIC,
+    MIXIN,
     PARAMETER,
     SETTER_DECLARATION,
     TOP_LEVEL_VARIABLE,
@@ -2416,6 +2420,8 @@ class HighlightRegionType implements Enum {
         return METHOD_DECLARATION_STATIC;
       case 'METHOD_STATIC':
         return METHOD_STATIC;
+      case 'MIXIN':
+        return MIXIN;
       case 'PARAMETER':
         return PARAMETER;
       case 'SETTER_DECLARATION':
diff --git a/pkg/analyzer_plugin/doc/api.html b/pkg/analyzer_plugin/doc/api.html
index 82bc04611c6..e2d7a05785c 100644
--- a/pkg/analyzer_plugin/doc/api.html
+++ b/pkg/analyzer_plugin/doc/api.html
@@ -1449,7 +1449,7 @@ a:focus, a:hover {
       </dd><dt class="value">METHOD_STATIC</dt><dd>
         
         <p>Deprecated - no longer sent.</p>
-      </dd><dt class="value">PARAMETER</dt><dd>
+      </dd><dt class="value">MIXIN</dt><dt class="value">PARAMETER</dt><dd>
         
         <p>Deprecated - no longer sent.</p>
       </dd><dt class="value">SETTER_DECLARATION</dt><dd>
diff --git a/pkg/analyzer_plugin/lib/protocol/protocol_common.dart b/pkg/analyzer_plugin/lib/protocol/protocol_common.dart
index 7f6bb07134a..4987b67ec1f 100644
--- a/pkg/analyzer_plugin/lib/protocol/protocol_common.dart
+++ b/pkg/analyzer_plugin/lib/protocol/protocol_common.dart
@@ -1935,6 +1935,7 @@ class HighlightRegion implements HasToJson {
 ///   METHOD_DECLARATION
 ///   METHOD_DECLARATION_STATIC
 ///   METHOD_STATIC
+///   MIXIN
 ///   PARAMETER
 ///   SETTER_DECLARATION
 ///   TOP_LEVEL_VARIABLE
@@ -2133,6 +2134,8 @@ class HighlightRegionType implements Enum {
   static const HighlightRegionType METHOD_STATIC =
       HighlightRegionType._('METHOD_STATIC');
 
+  static const HighlightRegionType MIXIN = HighlightRegionType._('MIXIN');
+
   /// Deprecated - no longer sent.
   static const HighlightRegionType PARAMETER =
       HighlightRegionType._('PARAMETER');
@@ -2271,6 +2274,7 @@ class HighlightRegionType implements Enum {
     METHOD_DECLARATION,
     METHOD_DECLARATION_STATIC,
     METHOD_STATIC,
+    MIXIN,
     PARAMETER,
     SETTER_DECLARATION,
     TOP_LEVEL_VARIABLE,
@@ -2416,6 +2420,8 @@ class HighlightRegionType implements Enum {
         return METHOD_DECLARATION_STATIC;
       case 'METHOD_STATIC':
         return METHOD_STATIC;
+      case 'MIXIN':
+        return MIXIN;
       case 'PARAMETER':
         return PARAMETER;
       case 'SETTER_DECLARATION':
diff --git a/pkg/analyzer_plugin/test/integration/support/protocol_matchers.dart b/pkg/analyzer_plugin/test/integration/support/protocol_matchers.dart
index 9bae54efcb8..1d38dbd229b 100644
--- a/pkg/analyzer_plugin/test/integration/support/protocol_matchers.dart
+++ b/pkg/analyzer_plugin/test/integration/support/protocol_matchers.dart
@@ -420,6 +420,7 @@ final Matcher isHighlightRegion = LazyMatcher(() => MatchesJsonObject(
 ///   METHOD_DECLARATION
 ///   METHOD_DECLARATION_STATIC
 ///   METHOD_STATIC
+///   MIXIN
 ///   PARAMETER
 ///   SETTER_DECLARATION
 ///   TOP_LEVEL_VARIABLE
@@ -503,6 +504,7 @@ final Matcher isHighlightRegionType = MatchesEnum('HighlightRegionType', [
   'METHOD_DECLARATION',
   'METHOD_DECLARATION_STATIC',
   'METHOD_STATIC',
+  'MIXIN',
   'PARAMETER',
   'SETTER_DECLARATION',
   'TOP_LEVEL_VARIABLE',
diff --git a/pkg/analyzer_plugin/tool/spec/common_types_spec.html b/pkg/analyzer_plugin/tool/spec/common_types_spec.html
index ef7bc5fbf11..e570bc46233 100644
--- a/pkg/analyzer_plugin/tool/spec/common_types_spec.html
+++ b/pkg/analyzer_plugin/tool/spec/common_types_spec.html
@@ -834,6 +834,7 @@
         <code>METHOD_STATIC</code>
         <p>Deprecated - no longer sent.</p>
       </value>
+      <value><code>MIXIN</code></value>
       <value>
         <code>PARAMETER</code>
         <p>Deprecated - no longer sent.</p>