A highlighting (or marking) composition, such as an ink, including a
non-eradicable colorant, an eradicable colorant; a kit including a first
marking instrument comprising the highlighting mixture and a second
marking instrument comprising an eradicator fluid; a colorant complex
including a colorless or substantially colorless eradicable dye, a
non-eradicable dye, and an eradicator; and methods of applying an
eradicator to at least a portion of a marking made with a highlighting
composition, are described herein.