foreground-color and background-color:
black.
white.
foreground for an item upon the workspace. Typically, the color setting for attribute displays of items, and for the text and border of items with a text box, such as rules, is foreground. The background color of a workspace also determines the value of the metacolor
transparent for any item upon the workspace. Typically, the background color setting for items with a text box, such as rules, is set to transparent.