sysClr
sysClr represents a system color, and introduces a level of indirection. For example, specifying:
<a:sysClr val="windowText">
binds the color to be the color chosen in the system for "Window Text". The possible values are:
scrollBar background activeCaption inactiveCaption menu window windowFrame menuText windowText captionText activeBorder inactiveBorder appWorkspace highlight highlightText btnFace btnShadow grayText btnText inactiveCaptionText btnHighlight 3dDkShadow 3dLight infoText infoBk hotLight gradientActiveCaption gradientInactiveCaption menuHighlight menuBar