The current application is for a cosmetic marker device which applies a specifically formulated hair dye to the hair in a very controllable manner to the region proximate to hair roots to cover hair. Preferably, the hair is newly grown graying hair. The marker product of this invention employs a single fiber construction that delivers a specially formulated hair dye in a manner that enables the user to color just the area of hair that is of interest without staining the scalp to any large extent.