diff --git a/poi/src/main/java/org/apache/poi/hssf/usermodel/HSSFExtendedColor.java b/poi/src/main/java/org/apache/poi/hssf/usermodel/HSSFExtendedColor.java
index b1782631856..54390cb59a5 100644
--- a/poi/src/main/java/org/apache/poi/hssf/usermodel/HSSFExtendedColor.java
+++ b/poi/src/main/java/org/apache/poi/hssf/usermodel/HSSFExtendedColor.java
@@ -89,6 +89,7 @@ public void setRGB(byte[] rgb) {
             byte[] rgba = new byte[4];
             System.arraycopy(rgb, 0, rgba, 0, 3);
             rgba[3] = -1;
+            color.setRGBA(rgba);
         } else {
             // Shuffle from ARGB to RGBA
             byte a = rgb[0];