Office2007 Ribbon button borders are characterized by an outer border which is drawn with a vertical gradient and an inner border which is partially transparent and modifies the color of the Background.
Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Server 2012, Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2