diff --git a/src/PhpPresentation/Style/Color.php b/src/PhpPresentation/Style/Color.php
index d962fee08..c8c53706a 100644
--- a/src/PhpPresentation/Style/Color.php
+++ b/src/PhpPresentation/Style/Color.php
@@ -87,6 +87,21 @@ public function setARGB($pValue = self::COLOR_BLACK)
         return $this;
     }
 
+    /**
+     * Get the alpha % of the ARGB
+     * Will return 100 if no ARGB
+     * @return integer
+     */
+    public function getAlpha()
+    {
+        $alpha = 100;
+        if (strlen($this->argb) >= 6) {
+            $dec = hexdec(substr($this->argb, 0, 2));
+            $alpha = number_format(( $dec/255 ) * 100, 2);
+        }
+        return $alpha;
+    }
+
     /**
      * Get RGB
      *
diff --git a/src/PhpPresentation/Writer/PowerPoint2007/AbstractDecoratorWriter.php b/src/PhpPresentation/Writer/PowerPoint2007/AbstractDecoratorWriter.php
index d8a126442..b0d3a6ae1 100644
--- a/src/PhpPresentation/Writer/PowerPoint2007/AbstractDecoratorWriter.php
+++ b/src/PhpPresentation/Writer/PowerPoint2007/AbstractDecoratorWriter.php
@@ -155,6 +155,12 @@ protected function writeSolidFill(XMLWriter $objWriter, Fill $pFill)
         // srgbClr
         $objWriter->startElement('a:srgbClr');
         $objWriter->writeAttribute('val', $pFill->getStartColor()->getRGB());
+
+        // a:alpha
+        $objWriter->startElement('a:alpha');
+        $objWriter->writeAttribute('val', $pFill->getStartColor()->getAlpha() * 1000);
+        $objWriter->endElement();
+
         $objWriter->endElement();
 
         $objWriter->endElement();
@@ -181,6 +187,12 @@ protected function writeGradientFill(XMLWriter $objWriter, Fill $pFill)
         // srgbClr
         $objWriter->startElement('a:srgbClr');
         $objWriter->writeAttribute('val', $pFill->getStartColor()->getRGB());
+
+        // a:alpha
+        $objWriter->startElement('a:alpha');
+        $objWriter->writeAttribute('val', $pFill->getStartColor()->getAlpha() * 1000);
+        $objWriter->endElement();
+
         $objWriter->endElement();
 
         $objWriter->endElement();
@@ -192,6 +204,12 @@ protected function writeGradientFill(XMLWriter $objWriter, Fill $pFill)
         // srgbClr
         $objWriter->startElement('a:srgbClr');
         $objWriter->writeAttribute('val', $pFill->getEndColor()->getRGB());
+
+        // a:alpha
+        $objWriter->startElement('a:alpha');
+        $objWriter->writeAttribute('val', $pFill->getEndColor()->getAlpha() * 1000);
+        $objWriter->endElement();
+
         $objWriter->endElement();
 
         $objWriter->endElement();
@@ -225,6 +243,12 @@ protected function writePatternFill(XMLWriter $objWriter, Fill $pFill)
         // srgbClr
         $objWriter->startElement('a:srgbClr');
         $objWriter->writeAttribute('val', $pFill->getStartColor()->getRGB());
+
+        // a:alpha
+        $objWriter->startElement('a:alpha');
+        $objWriter->writeAttribute('val', $pFill->getStartColor()->getAlpha() * 1000);
+        $objWriter->endElement();
+
         $objWriter->endElement();
 
         $objWriter->endElement();
@@ -235,6 +259,12 @@ protected function writePatternFill(XMLWriter $objWriter, Fill $pFill)
         // srgbClr
         $objWriter->startElement('a:srgbClr');
         $objWriter->writeAttribute('val', $pFill->getEndColor()->getRGB());
+
+        // a:alpha
+        $objWriter->startElement('a:alpha');
+        $objWriter->writeAttribute('val', $pFill->getEndColor()->getAlpha() * 1000);
+        $objWriter->endElement();
+
         $objWriter->endElement();
 
         $objWriter->endElement();