On the Color settings dialog, 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.
•Caution: deleting, or even only renaming a color, can cause problems in production! If you delete a color, all objects which use that color, on any page or in any of object library of this 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 that a color is used on a page, in a object, or in a style.
To learn more about colors, see