Abstract: In various exemplary embodiments, a method for computer-aided hair color counseling is provided. The method may comprise: recording a digital image of hair of a user and additional objects by employing a camera, identifying a hair region area in the digital image in which the hair is depicted, identifying a new hair color, aligning a hair projection region in which the hair is projected, of a transparent or reflecting screen or a system of screen and one-way mirror in a manner such that, to an observer of the screen, a combination of the objects transmitted or reflected by the screen is produced with the hair projection region, wherein the hair projection region is aligned in a manner such that it essentially covers a hair transmission/reflection region in which to the observer, the transmitted or reflected user's hair would appear, and projecting the hair projection region in the new hair color.