diff --git a/CHANGELOG.md b/CHANGELOG.md
index 470125e9..0df44842 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,10 @@ FlatLaf Change Log
 
 ## 3.3-SNAPSHOT
 
+#### New features and improvements
+
+- ToolBar: Added styling properties `separatorWidth` and `separatorColor`.
+
 #### Fixed bugs
 
 - Button and ToggleButton: Selected buttons did not use explicitly set
@@ -188,7 +192,6 @@ FlatLaf Change Log
   - Windows DLLs are now digitally signed with FormDev Software GmbH
     certificate.
 
-
 #### Fixed bugs
 
 - FlatLaf window decorations:
diff --git a/flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatToolBarSeparatorUI.java b/flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatToolBarSeparatorUI.java
index ae277db7..cae180bd 100644
--- a/flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatToolBarSeparatorUI.java
+++ b/flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatToolBarSeparatorUI.java
@@ -18,6 +18,7 @@ package com.formdev.flatlaf.ui;
 
 import static com.formdev.flatlaf.util.UIScale.scale;
 import java.awt.Color;
+import java.awt.Container;
 import java.awt.Dimension;
 import java.awt.Graphics;
 import java.awt.Graphics2D;
@@ -173,6 +174,12 @@ public class FlatToolBarSeparatorUI
 		if( size != null )
 			return scale( size );
 
+		// get separator width
+		int separatorWidth = this.separatorWidth;
+		FlatToolBarUI toolBarUI = getToolBarUI( c );
+		if( toolBarUI != null && toolBarUI.separatorWidth != null )
+			separatorWidth = toolBarUI.separatorWidth;
+
 		// make sure that gap on left and right side of line have same size
 		int sepWidth = (scale( (separatorWidth - LINE_WIDTH) / 2 ) * 2) + scale( LINE_WIDTH );
 
@@ -196,6 +203,12 @@ public class FlatToolBarSeparatorUI
 		float lineWidth = scale( 1f );
 		float offset = scale( 2f );
 
+		// get separator color
+		Color separatorColor = this.separatorColor;
+		FlatToolBarUI toolBarUI = getToolBarUI( c );
+		if( toolBarUI != null && toolBarUI.separatorColor != null )
+			separatorColor = toolBarUI.separatorColor;
+
 		Object[] oldRenderingHints = FlatUIUtils.setRenderingHints( g );
 		g.setColor( separatorColor );
 
@@ -210,4 +223,11 @@ public class FlatToolBarSeparatorUI
 	private boolean isVertical( JComponent c ) {
 		return ((JToolBar.Separator)c).getOrientation() == SwingConstants.VERTICAL;
 	}
+
+	private FlatToolBarUI getToolBarUI( JComponent c ) {
+		Container parent = c.getParent();
+		return (parent instanceof JToolBar && ((JToolBar)parent).getUI() instanceof FlatToolBarUI)
+			? (FlatToolBarUI) ((JToolBar)parent).getUI()
+			: null;
+	}
 }
diff --git a/flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatToolBarUI.java b/flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatToolBarUI.java
index 1eca1479..c6d97f5d 100644
--- a/flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatToolBarUI.java
+++ b/flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatToolBarUI.java
@@ -93,6 +93,10 @@ public class FlatToolBarUI
 	@Styleable protected Insets borderMargins;
 	@Styleable protected Color gripColor;
 
+	// for FlatToolBarSeparatorUI
+	/** @since 3.3 */ @Styleable protected Integer separatorWidth;
+	/** @since 3.3 */ @Styleable protected Color separatorColor;
+
 	private FocusTraversalPolicy focusTraversalPolicy;
 	private Boolean oldFloatable;
 	private Map<String, Object> oldStyleValues;
diff --git a/flatlaf-core/src/test/java/com/formdev/flatlaf/ui/TestFlatStyleableInfo.java b/flatlaf-core/src/test/java/com/formdev/flatlaf/ui/TestFlatStyleableInfo.java
index 028030d8..645dc920 100644
--- a/flatlaf-core/src/test/java/com/formdev/flatlaf/ui/TestFlatStyleableInfo.java
+++ b/flatlaf-core/src/test/java/com/formdev/flatlaf/ui/TestFlatStyleableInfo.java
@@ -925,7 +925,10 @@ public class TestFlatStyleableInfo
 			"hoverButtonGroupBackground", Color.class,
 
 			"borderMargins", Insets.class,
-			"gripColor", Color.class
+			"gripColor", Color.class,
+
+			"separatorWidth", Integer.class,
+			"separatorColor", Color.class
 		);
 
 		assertMapEquals( expected, ui.getStyleableInfos( c ) );
diff --git a/flatlaf-core/src/test/java/com/formdev/flatlaf/ui/TestFlatStyleableValue.java b/flatlaf-core/src/test/java/com/formdev/flatlaf/ui/TestFlatStyleableValue.java
index 7e5b1127..a7199f71 100644
--- a/flatlaf-core/src/test/java/com/formdev/flatlaf/ui/TestFlatStyleableValue.java
+++ b/flatlaf-core/src/test/java/com/formdev/flatlaf/ui/TestFlatStyleableValue.java
@@ -902,6 +902,9 @@ public class TestFlatStyleableValue
 
 		testInsets( c, ui, "borderMargins", 1,2,3,4 );
 		testColor( c, ui, "gripColor", 0x123456 );
+
+		testInteger( c, ui, "separatorWidth", 123 );
+		testColor( c, ui, "separatorColor", 0x123456 );
 	}
 
 	@Test
diff --git a/flatlaf-core/src/test/java/com/formdev/flatlaf/ui/TestFlatStyling.java b/flatlaf-core/src/test/java/com/formdev/flatlaf/ui/TestFlatStyling.java
index a336b380..927086c3 100644
--- a/flatlaf-core/src/test/java/com/formdev/flatlaf/ui/TestFlatStyling.java
+++ b/flatlaf-core/src/test/java/com/formdev/flatlaf/ui/TestFlatStyling.java
@@ -1146,6 +1146,9 @@ public class TestFlatStyling
 		ui.applyStyle( "borderMargins: 1,2,3,4" );
 		ui.applyStyle( "gripColor: #fff" );
 
+		ui.applyStyle( "separatorWidth: 6" );
+		ui.applyStyle( "separatorColor: #fff" );
+
 		// JComponent properties
 		ui.applyStyle( "background: #fff" );
 		ui.applyStyle( "foreground: #fff" );