diff --git a/CMakeLists.txt b/CMakeLists.txt
index 307146b..6f09424 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -39,6 +39,23 @@ else ()
 	set(PC_Requires "QtCore")
 endif ()
 
+option (QTGUI_TYPES "Build with support for QtGui types")
+if (QTGUI_TYPES)
+	if (QT4_BUILD)
+		find_package(Qt4 QTGUI)
+	else ()
+		find_package(Qt5Gui QUIET)
+	endif ()
+endif ()
+
+if (Qt5Gui_FOUND)
+	message("Qt5Gui found")
+	include_directories(${Qt5Gui_INCLUDE_DIRS})
+	add_definitions(${Qt5Gui_DEFINITIONS})
+else ()
+	message("Qt5Gui not found")
+endif ()
+
 if (NOT WIN32)
 	set(QT_DONT_USE_QTGUI TRUE)
 endif ()
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index e82a68b..7ac4d56 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -1,4 +1,4 @@
-set(qmsgpack_srcs msgpack.cpp msgpack_common.cpp private/pack_p.cpp private/unpack_p.cpp)
+set(qmsgpack_srcs msgpack.cpp msgpack_common.cpp private/pack_p.cpp private/unpack_p.cpp private/qt_types_p.cpp)
 set(qmsgpack_headers msgpack.h msgpack_common.h msgpack_export.h)
 
 add_library(qmsgpack SHARED ${qmsgpack_srcs} ${qmsgpack_headers})
@@ -9,6 +9,10 @@ else ()
 	target_link_libraries(qmsgpack ${QT_LIBRARIES})
 endif ()
 
+if (Qt5Gui_FOUND)
+	target_link_libraries(qmsgpack Qt5::Gui)
+endif ()
+
 configure_file(
   "${CMAKE_CURRENT_SOURCE_DIR}/msgpack_common.h.in"
   "${CMAKE_CURRENT_SOURCE_DIR}/msgpack_common.h"
diff --git a/src/msgpack-qt.pro b/src/msgpack-qt.pro
index f1c6d18..97ddb4b 100644
--- a/src/msgpack-qt.pro
+++ b/src/msgpack-qt.pro
@@ -6,7 +6,7 @@
 
 QT       += core
 
-QT       -= gui
+QT       += gui
 
 TARGET = qmsgpack
 CONFIG   -= app_bundle
@@ -26,7 +26,8 @@ CONFIG(debug, debug|release) {
 SOURCES += msgpack.cpp \
     msgpack_common.cpp \
     private/pack_p.cpp \
-    private/unpack_p.cpp
+    private/unpack_p.cpp \
+    private/qt_types_p.cpp
 
 HEADERS += \
     msgpack.h \
@@ -34,4 +35,5 @@ HEADERS += \
     private/unpack_p.h \
     private/sysdep.h \
     msgpack_common.h \
-    msgpack_export.h
+    msgpack_export.h \
+    private/qt_types_p.h
diff --git a/src/msgpack.cpp b/src/msgpack.cpp
index 36e011e..0ab84cd 100644
--- a/src/msgpack.cpp
+++ b/src/msgpack.cpp
@@ -2,6 +2,7 @@
 #include "msgpack_common.h"
 #include "private/unpack_p.h"
 #include "private/pack_p.h"
+#include "private/qt_types_p.h"
 
 QVariant MsgPack::unpack(const QByteArray &data)
 {
@@ -35,6 +36,11 @@ bool MsgPack::registerUnpacker(qint8 msgpackType, MsgPack::unpack_user_f unpacke
     return MsgPackPrivate::register_unpacker(msgpackType, unpacker);
 }
 
+bool MsgPack::registerType(QMetaType::Type qType, quint8 msgpackType)
+{
+    return MsgPackPrivate::register_qtype(qType, msgpackType);
+}
+
 void MsgPack::setCompatibilityModeEnabled(bool enabled)
 {
     MsgPackPrivate::compatibilityMode = enabled;
diff --git a/src/msgpack.h b/src/msgpack.h
index cf4c540..4d3e603 100644
--- a/src/msgpack.h
+++ b/src/msgpack.h
@@ -1,12 +1,10 @@
 #ifndef MSGPACK_H
 #define MSGPACK_H
-
+#include <QByteArray>
+#include <QVariantList>
 #include "msgpack_common.h"
 #include "msgpack_export.h"
 
-#include <QByteArray>
-#include <QMetaType>
-
 namespace MsgPack
 {
     MSGPACK_EXPORT QVariant unpack(const QByteArray &data);
@@ -15,6 +13,8 @@ namespace MsgPack
     MSGPACK_EXPORT QByteArray pack(const QVariant &variant);
     MSGPACK_EXPORT bool registerPacker(QMetaType::Type qType, qint8 msgpackType, pack_user_f packer);
 
+    MSGPACK_EXPORT bool registerType(QMetaType::Type qType, quint8 msgpackType);
+
     MSGPACK_EXPORT void setCompatibilityModeEnabled(bool enabled);
 }
 
diff --git a/src/msgpack_common.h b/src/msgpack_common.h
index 3c62f7c..7311e7a 100644
--- a/src/msgpack_common.h
+++ b/src/msgpack_common.h
@@ -2,6 +2,7 @@
 #define COMMON_H
 
 #include <QVariant>
+#include <QtGlobal>
 
 #define MSGPACK_MAJOR 0
 #define MSGPACK_MINOR 1
@@ -24,6 +25,48 @@ typedef QVariant (*unpack_user_f)(const QByteArray &data);
  * @return current version
  */
 QString version();
+/**
+ * @brief The FirstByte enum
+ * From Message Pack spec
+ */
+namespace FirstByte {
+const quint8 POSITIVE_FIXINT = 0x00;
+const quint8 FIXMAP     = 0x80;
+const quint8 FIXARRAY   = 0x90;
+const quint8 FIXSTR     = 0xa0;
+const quint8 NIL        = 0xc0;
+const quint8 NEVER_USED = 0xc1;
+const quint8 FALSE      = 0xc2;
+const quint8 TRUE       = 0xc3;
+const quint8 BIN8       = 0xc4;
+const quint8 BIN16      = 0xc5;
+const quint8 BIN32      = 0xc6;
+const quint8 EXT8       = 0xc7;
+const quint8 EXT16      = 0xc8;
+const quint8 EXT32      = 0xc9;
+const quint8 FLOAT32	= 0xca;
+const quint8 FLOAT64	= 0xcb;
+const quint8 UINT8      = 0xcc;
+const quint8 UINT16 	= 0xcd;
+const quint8 UINT32     = 0xce;
+const quint8 UINT64 	= 0xcf;
+const quint8 INT8       = 0xd0;
+const quint8 INT16      = 0xd1;
+const quint8 INT32      = 0xd2;
+const quint8 INT64      = 0xd3;
+const quint8 FIXEXT1	= 0xd4;
+const quint8 FIXEXT2    = 0xd5;
+const quint8 FIXEXT4    = 0xd6;
+const quint8 FIXEXT8    = 0xd7;
+const quint8 FIXEX16    = 0xd8;
+const quint8 STR8       = 0xd9;
+const quint8 STR16      = 0xda;
+const quint8 STR32      = 0xdb;
+const quint8 ARRAY8     = 0xdc;
+const quint8 ARRAY16    = 0xdd;
+const quint8 MAP16      = 0xde;
+const quint8 MAP32      = 0xdf;
+const quint8 NEGATIVE_FIXINT = 0xe0;
+}
 }
-
 #endif // COMMON_H
diff --git a/src/msgpack_common.h.in b/src/msgpack_common.h.in
index 9e140bc..fbf906d 100644
--- a/src/msgpack_common.h.in
+++ b/src/msgpack_common.h.in
@@ -2,6 +2,7 @@
 #define COMMON_H
 
 #include <QVariant>
+#include <QtGlobal>
 
 #define MSGPACK_MAJOR @QMSGPACK_MAJOR@
 #define MSGPACK_MINOR @QMSGPACK_MINOR@
@@ -24,6 +25,48 @@ typedef QVariant (*unpack_user_f)(const QByteArray &data);
  * @return current version
  */
 QString version();
+/**
+ * @brief The FirstByte enum
+ * From Message Pack spec
+ */
+namespace FirstByte {
+const quint8 POSITIVE_FIXINT = 0x00;
+const quint8 FIXMAP     = 0x80;
+const quint8 FIXARRAY   = 0x90;
+const quint8 FIXSTR     = 0xa0;
+const quint8 NIL        = 0xc0;
+const quint8 NEVER_USED = 0xc1;
+const quint8 FALSE      = 0xc2;
+const quint8 TRUE       = 0xc3;
+const quint8 BIN8       = 0xc4;
+const quint8 BIN16      = 0xc5;
+const quint8 BIN32      = 0xc6;
+const quint8 EXT8       = 0xc7;
+const quint8 EXT16      = 0xc8;
+const quint8 EXT32      = 0xc9;
+const quint8 FLOAT32	= 0xca;
+const quint8 FLOAT64	= 0xcb;
+const quint8 UINT8      = 0xcc;
+const quint8 UINT16 	= 0xcd;
+const quint8 UINT32     = 0xce;
+const quint8 UINT64 	= 0xcf;
+const quint8 INT8       = 0xd0;
+const quint8 INT16      = 0xd1;
+const quint8 INT32      = 0xd2;
+const quint8 INT64      = 0xd3;
+const quint8 FIXEXT1	= 0xd4;
+const quint8 FIXEXT2    = 0xd5;
+const quint8 FIXEXT4    = 0xd6;
+const quint8 FIXEXT8    = 0xd7;
+const quint8 FIXEX16    = 0xd8;
+const quint8 STR8       = 0xd9;
+const quint8 STR16      = 0xda;
+const quint8 STR32      = 0xdb;
+const quint8 ARRAY8     = 0xdc;
+const quint8 ARRAY16    = 0xdd;
+const quint8 MAP16      = 0xde;
+const quint8 MAP32      = 0xdf;
+const quint8 NEGATIVE_FIXINT = 0xe0;
+}
 }
-
 #endif // COMMON_H
diff --git a/src/private/qt_types_p.cpp b/src/private/qt_types_p.cpp
new file mode 100644
index 0000000..0bac757
--- /dev/null
+++ b/src/private/qt_types_p.cpp
@@ -0,0 +1,46 @@
+#include "qt_types_p.h"
+#include "pack_p.h"
+#include "unpack_p.h"
+
+#include <QDebug>
+
+#ifdef QT_GUI_LIB
+#include <QColor>
+#endif
+#define NO_QTGUI_WARNING "Library built without QtGui, hence some types are not available"
+
+bool MsgPackPrivate::register_qtype(QMetaType::Type q_type, quint8 msgpack_type)
+{
+	if (q_type == QMetaType::QColor) {
+		#ifdef QT_GUI_LIB
+		qRegisterMetaType<QColor>("QColor");
+    	MsgPackPrivate::register_packer((QMetaType::Type)qMetaTypeId<QColor>(), msgpack_type, pack_qcolor);
+    	MsgPackPrivate::register_unpacker(msgpack_type, unpack_qcolor);
+    	return true;
+    	#else
+    	qWarning() << NO_QTGUI_WARNING;
+    	return false;
+    	#endif //QT_GUI_LIB
+	}
+}
+
+#ifdef QT_GUI_LIB
+quint32 MsgPackPrivate::pack_qcolor(const QVariant &variant, QByteArray &data, bool write)
+{
+    if (write) {
+        QColor color = variant.value<QColor>();
+        data.resize(4);
+        data[0] = color.red();
+        data[1] = color.green();
+        data[2] = color.blue();
+        data[3] = color.alpha();
+    }
+    return 4; // 4 bytes: r,g,b,a
+}
+
+QVariant MsgPackPrivate::unpack_qcolor(const QByteArray &data)
+{
+    return QColor((quint8)data[0], (quint8)data[1],
+                  (quint8)data[2], (quint8)data[3]);
+}
+#endif //MsgPackPrivate
diff --git a/src/private/qt_types_p.h b/src/private/qt_types_p.h
new file mode 100644
index 0000000..a83d2e1
--- /dev/null
+++ b/src/private/qt_types_p.h
@@ -0,0 +1,18 @@
+#ifndef QT_TYPES_P_H
+#define QT_TYPES_P_H
+
+#include <QVariant>
+#include <QByteArray>
+
+namespace MsgPackPrivate
+{
+bool register_qtype(QMetaType::Type q_type, quint8 msgpack_type);
+
+#ifdef QT_GUI_LIB
+quint32 pack_qcolor(const QVariant &variant, QByteArray &data, bool write);
+QVariant unpack_qcolor(const QByteArray &data);
+#endif //QT_GUI_LIB
+
+} // MsgPackPrivate
+
+#endif // QT_TYPES_P_H
\ No newline at end of file