Sets the colors of the upper and left corners of the cell. Used with borderColorDark to set the lighter colors in an element’s shaded border. Deprecated in HTML4, unsupported in HTML5. Use CSS.
This property is the opposite of borderColorDark and must be used with the border property that corresponds to the BORDER attribute. This property does not affect the Cascading Style Sheets (CSS) border composite properties. Some client applications do not recognize color names, but all client applications should recognize RGB color values and display them correctly. This property is no longer recommended. Use the borderColor property instead.
Microsoft Developer Network: [Windows Internet Explorer API reference Article]