diff --git a/MM.cpp b/MM.cpp
new file mode 100644
index 0000000..5191151
--- /dev/null
+++ b/MM.cpp
@@ -0,0 +1,26 @@
+/*
+ * MM.cpp
+ *
+ * (c) 2013 Sofian Audry -- info(@)sofianaudry(.)com
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "MM.h"
+
+const QColor MM::WHITE("#f6f5f5");
+const QColor MM::BLUE_GRAY("#323541");
+const QColor MM::DARK_GRAY("#272a36");
+
+
diff --git a/MM.h b/MM.h
new file mode 100644
index 0000000..22232b8
--- /dev/null
+++ b/MM.h
@@ -0,0 +1,44 @@
+/*
+ * MM.h
+ *
+ * (c) 2013 Sofian Audry -- info(@)sofianaudry(.)com
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef MM_H_
+#define MM_H_
+
+#include <QtGlobal>
+#include <QColor>
+
+class MM
+{
+public:
+  // GUI.
+  static const int DEFAULT_WINDOW_WIDTH = 640;
+  static const int DEFAULT_WINDOW_HEIGHT = 480;
+
+  // Style.
+  static const QColor WHITE;
+  static const QColor BLUE_GRAY;
+  static const QColor DARK_GRAY;
+
+  // Control.
+  static const qreal VERTEX_STICK_RADIUS = 10;
+};
+
+#endif
+
+