Selection color from accent color

Signed-off-by: Slendi <slendi@socopon.com>

src/App.hpp

@@ -191,5 +191,7 @@ private:
 	bool m_running { true };
 	bool m_visible { true };
 
+	Color m_accent_color { 127, 127, 255, 255 };
+
 	int m_sfd { -1 };
 };