On the Edit menu, click Colors.
Select a color, and then click the Delete button.
Notes
•You cannot undo the deletion, but you can abort all changes, by closing the color dialog box with Cancel.
•All objects which use deleted color, on any page or in any of object library of the current title, will become transparent. All styles in any format of this title, which contain deleted color, will cause a justification error.
•There is no warning if a color is used on a page, in a object, or in a style.
•If you immediately re-create deleted color using the same color name, there will be no problems neither on page objects, nor in colored texts.
•Page objects refer to colors by their internal ID numbers, while tags use the color names.