diff --git a/designer-base/src/main/java/com/fr/design/mainframe/theme/TemplateThemeBlock.java b/designer-base/src/main/java/com/fr/design/mainframe/theme/TemplateThemeBlock.java
index d014199f35..e00bc445c0 100644
--- a/designer-base/src/main/java/com/fr/design/mainframe/theme/TemplateThemeBlock.java
+++ b/designer-base/src/main/java/com/fr/design/mainframe/theme/TemplateThemeBlock.java
@@ -211,6 +211,11 @@ public class TemplateThemeBlock<T extends TemplateTheme> extends JPanel {
         public void paint(Graphics g) {
             super.paint(g);
             Graphics2D g2d = (Graphics2D) g;
+            Color oldColor = g2d.getColor();
+            g2d.setColor(Color.WHITE);
+            g2d.fillRect(0, 0, getWidth(), getHeight());
+            g2d.setColor(oldColor);
+
             paintCenterImage(g2d, thumbnail != null ? thumbnail : LOADING_IMAGE);
         }