diff --git a/bootstrap-core/src/main/java/de/agilecoders/wicket/core/markup/html/bootstrap/utilities/BackgroundColorBehavior.java b/bootstrap-core/src/main/java/de/agilecoders/wicket/core/markup/html/bootstrap/utilities/BackgroundColorBehavior.java
index 3c3fb33f9..9adc78497 100644
--- a/bootstrap-core/src/main/java/de/agilecoders/wicket/core/markup/html/bootstrap/utilities/BackgroundColorBehavior.java
+++ b/bootstrap-core/src/main/java/de/agilecoders/wicket/core/markup/html/bootstrap/utilities/BackgroundColorBehavior.java
@@ -18,16 +18,29 @@ public class BackgroundColorBehavior extends BootstrapBaseBehavior {
 
     /**
      * Enumeration of all possible background colors.
+     * https://getbootstrap.com/docs/5.3/utilities/background/
      */
     public enum Color implements ICssClassNameProvider {
         Primary("primary"),
+        Primary_subtle("primary-subtle"),
         Secondary("secondary"),
+        Secondary_subtle("secondary-subtle"),
+        Success("success"),
+        Success_subtle("success-subtle"),
         Danger("danger"),
+        Danger_subtle("danger-subtle"),
         Warning("warning"),
+        Warning_subtle("warning-subtle"),
         Info("info"),
-        Success("success"),
+        Info_subtle("info-subtle"),
         Light("light"),
+        Light_subtle("light-subtle"),
         Dark("dark"),
+        Dark_subtle("dark-subtle"),
+        Body_secondary("body-secondary"),
+        Body_tertiary("body-tertiary"),
+        Body("body"),
+        Black("black"),
         White("white"),
         Transparent("transparent");
 
@@ -110,7 +123,6 @@ public Color getColor() {
     public IModel<Color> getColorModel() {
         return colorModel;
     }
-
     /**
      * Constructs new behavior that adds {@link BackgroundColorBehavior.Color#Primary} to component
      *
@@ -120,6 +132,15 @@ public static BackgroundColorBehavior primary() {
         return new BackgroundColorBehavior(Color.Primary);
     }
 
+    /**
+     * Constructs new behavior that adds {@link BackgroundColorBehavior.Color#Primary_subtle} to component
+     *
+     * @return behavior that adds primary subtle background color to component
+     */
+    public static BackgroundColorBehavior primarySubtle() {
+        return new BackgroundColorBehavior(Color.Primary_subtle);
+    }
+
     /**
      * Constructs new behavior that adds {@link BackgroundColorBehavior.Color#Secondary} to component
      *
@@ -129,6 +150,33 @@ public static BackgroundColorBehavior secondary() {
         return new BackgroundColorBehavior(Color.Secondary);
     }
 
+    /**
+     * Constructs new behavior that adds {@link BackgroundColorBehavior.Color#Secondary_subtle} to component
+     *
+     * @return behavior that adds secondary subtle background color to component
+     */
+    public static BackgroundColorBehavior secondarySubtle() {
+        return new BackgroundColorBehavior(Color.Secondary_subtle);
+    }
+
+    /**
+     * Constructs new behavior that adds {@link BackgroundColorBehavior.Color#Success} to component
+     *
+     * @return behavior that adds success background color to component
+     */
+    public static BackgroundColorBehavior success() {
+        return new BackgroundColorBehavior(Color.Success);
+    }
+
+    /**
+     * Constructs new behavior that adds {@link BackgroundColorBehavior.Color#Success_subtle} to component
+     *
+     * @return behavior that adds success subtle background color to component
+     */
+    public static BackgroundColorBehavior successSubtle() {
+        return new BackgroundColorBehavior(Color.Success_subtle);
+    }
+
     /**
      * Constructs new behavior that adds {@link BackgroundColorBehavior.Color#Danger} to component
      *
@@ -138,6 +186,15 @@ public static BackgroundColorBehavior danger() {
         return new BackgroundColorBehavior(Color.Danger);
     }
 
+    /**
+     * Constructs new behavior that adds {@link BackgroundColorBehavior.Color#Danger_subtle} to component
+     *
+     * @return behavior that adds danger subtle background color to component
+     */
+    public static BackgroundColorBehavior dangerSubtle() {
+        return new BackgroundColorBehavior(Color.Danger_subtle);
+    }
+
     /**
      * Constructs new behavior that adds {@link BackgroundColorBehavior.Color#Warning} to component
      *
@@ -148,12 +205,12 @@ public static BackgroundColorBehavior warning() {
     }
 
     /**
-     * Constructs new behavior that adds {@link BackgroundColorBehavior.Color#Success} to component
+     * Constructs new behavior that adds {@link BackgroundColorBehavior.Color#Warning_subtle} to component
      *
-     * @return behavior that adds success background color to component
+     * @return behavior that adds warning subtle background color to component
      */
-    public static BackgroundColorBehavior success() {
-        return new BackgroundColorBehavior(Color.Success);
+    public static BackgroundColorBehavior warningSubtle() {
+        return new BackgroundColorBehavior(Color.Warning_subtle);
     }
 
     /**
@@ -165,6 +222,15 @@ public static BackgroundColorBehavior info() {
         return new BackgroundColorBehavior(Color.Info);
     }
 
+    /**
+     * Constructs new behavior that adds {@link BackgroundColorBehavior.Color#Info_subtle} to component
+     *
+     * @return behavior that adds info subtle background color to component
+     */
+    public static BackgroundColorBehavior infoSubtle() {
+        return new BackgroundColorBehavior(Color.Info_subtle);
+    }
+
     /**
      * Constructs new behavior that adds {@link BackgroundColorBehavior.Color#Light} to component
      *
@@ -174,6 +240,15 @@ public static BackgroundColorBehavior light() {
         return new BackgroundColorBehavior(Color.Light);
     }
 
+    /**
+     * Constructs new behavior that adds {@link BackgroundColorBehavior.Color#Light_subtle} to component
+     *
+     * @return behavior that adds light subtle background color to component
+     */
+    public static BackgroundColorBehavior lightSubtle() {
+        return new BackgroundColorBehavior(Color.Light_subtle);
+    }
+
     /**
      * Constructs new behavior that adds {@link BackgroundColorBehavior.Color#Dark} to component
      *
@@ -183,6 +258,51 @@ public static BackgroundColorBehavior dark() {
         return new BackgroundColorBehavior(Color.Dark);
     }
 
+    /**
+     * Constructs new behavior that adds {@link BackgroundColorBehavior.Color#Dark_subtle} to component
+     *
+     * @return behavior that adds dark subtle background color to component
+     */
+    public static BackgroundColorBehavior darkSubtle() {
+        return new BackgroundColorBehavior(Color.Dark_subtle);
+    }
+
+    /**
+     * Constructs new behavior that adds {@link BackgroundColorBehavior.Color#Body_secondary} to component
+     *
+     * @return behavior that adds body secondary background color to component
+     */
+    public static BackgroundColorBehavior bodySecondary() {
+        return new BackgroundColorBehavior(Color.Body_secondary);
+    }
+
+    /**
+     * Constructs new behavior that adds {@link BackgroundColorBehavior.Color#Body_tertiary} to component
+     *
+     * @return behavior that adds body tertiary background color to component
+     */
+    public static BackgroundColorBehavior bodyTertiary() {
+        return new BackgroundColorBehavior(Color.Body_tertiary);
+    }
+
+    /**
+     * Constructs new behavior that adds {@link BackgroundColorBehavior.Color#Body} to component
+     *
+     * @return behavior that adds body background color to component
+     */
+    public static BackgroundColorBehavior body() {
+        return new BackgroundColorBehavior(Color.Body);
+    }
+
+    /**
+     * Constructs new behavior that adds {@link BackgroundColorBehavior.Color#Black} to component
+     *
+     * @return behavior that adds black background color to component
+     */
+    public static BackgroundColorBehavior black() {
+        return new BackgroundColorBehavior(Color.Black);
+    }
+
     /**
      * Constructs new behavior that adds {@link BackgroundColorBehavior.Color#White} to component
      *
@@ -200,4 +320,5 @@ public static BackgroundColorBehavior white() {
     public static BackgroundColorBehavior transparent() {
         return new BackgroundColorBehavior(Color.Transparent);
     }
+
 }