CSS2 defines the following system colors. (they are deprecated in CSS3)
◼ ActiveBorder
◼ ActiveCaption
◼ AppWorkspace
◼ Background
◼ ButtonFace
◼ ButtonHighlight
◼ ButtonShadow
◼ ButtonText
◼ CaptionText
◼ GrayText
◼ Highlight
◼ HighlightText
◼ InactiveBorder
◼ InactiveCaption
◼ InactiveCaptionText
◼ InfoBackground
◼ InfoText
◼ Menu
◼ MenuText
◼ Scrollbar
◼ ThreeDDarkShadow
◼ ThreeDFace
◼ ThreeDHighlight
◼ ThreeDLightShadow
◼ ThreeDShadow
◼ Window
◼ WindowFrame
◼ WindowText