diff --git a/src/xlsx/xlsxcolor.cpp b/src/xlsx/xlsxcolor.cpp
index c34470b..6be2ae7 100644
--- a/src/xlsx/xlsxcolor.cpp
+++ b/src/xlsx/xlsxcolor.cpp
@@ -4,6 +4,7 @@
 
 #include <QXmlStreamReader>
 #include <QXmlStreamWriter>
+#include <QDebug>
 
 namespace QXlsx {
 
@@ -176,4 +177,21 @@ QDataStream &operator>>(QDataStream &s, XlsxColor &color)
 
 #endif
 
+#ifndef QT_NO_DEBUG_STREAM
+QDebug operator<<(QDebug dbg, const XlsxColor &c)
+{
+    if (c.isInvalid())
+        dbg.nospace() << "XlsxColor(invalid)";
+    else if (c.isRgbColor())
+        dbg.nospace() << c.rgbColor();
+    else if (c.isIndexedColor())
+        dbg.nospace() << "XlsxColor(indexed," << c.indexedColor() << ")";
+    else if (c.isThemeColor())
+        dbg.nospace() << "XlsxColor(theme," << c.themeColor().join(QLatin1Char(':')) << ")";
+
+    return dbg.space();
+}
+
+#endif
+
 } // namespace QXlsx
diff --git a/src/xlsx/xlsxcolor_p.h b/src/xlsx/xlsxcolor_p.h
index a4081ae..9b4b3dc 100644
--- a/src/xlsx/xlsxcolor_p.h
+++ b/src/xlsx/xlsxcolor_p.h
@@ -48,7 +48,7 @@ namespace QXlsx {
 
 class Styles;
 
-class XlsxColor
+class Q_XLSX_EXPORT XlsxColor
 {
 public:
     explicit XlsxColor(const QColor &color = QColor());
@@ -77,8 +77,12 @@ private:
 };
 
 #if !defined(QT_NO_DATASTREAM)
-QDataStream &operator<<(QDataStream &, const XlsxColor &);
-QDataStream &operator>>(QDataStream &, XlsxColor &);
+Q_XLSX_EXPORT QDataStream &operator<<(QDataStream &, const XlsxColor &);
+Q_XLSX_EXPORT QDataStream &operator>>(QDataStream &, XlsxColor &);
+#endif
+
+#ifndef QT_NO_DEBUG_STREAM
+Q_XLSX_EXPORT QDebug operator<<(QDebug dbg, const XlsxColor &c);
 #endif
 
 } // namespace QXlsx
diff --git a/src/xlsx/xlsxformat.cpp b/src/xlsx/xlsxformat.cpp
index 8d81c70..56e34f2 100755
--- a/src/xlsx/xlsxformat.cpp
+++ b/src/xlsx/xlsxformat.cpp
@@ -180,7 +180,14 @@ FormatPrivate::~FormatPrivate()
  */
 Format::Format()
 {
-    qRegisterMetaTypeStreamOperators<XlsxColor>("XlsxColor");
+    if (QMetaType::type("XlsxColor") == QMetaType::UnknownType) {
+        //Fix me! Where should we put these register code?
+        qRegisterMetaType<XlsxColor>("XlsxColor");
+        qRegisterMetaTypeStreamOperators<XlsxColor>("XlsxColor");
+#if QT_VERSION >= 0x050200
+        QMetaType::registerDebugStreamOperator<XlsxColor>();
+#endif
+    }
     //The d pointer is initialized with a null pointer
 }