1. A computer-implemented method for generating halftone screens for moiré-free color halftoning, comprising: identifying a first color halftone screen having halftone cells defined by a first fundamental frequency vector (V 1 ) and a second fundamental frequency vector (V 2 ); selecting at least one shearing value (s) representative of an offset in at least one of a fast scan direction and a slow scan direction; shearing at least one of the first fundamental frequency vector (V 1 ) and the second fundamental frequency vector (V 2 ) for the first halftone screen by application of the shearing value (s) associated therewith; and generating a first sheared color halftone screen in accordance with at least one of the sheared first fundamental frequency vector (V 1 ) and the second fundamental frequency vector (V 2 ) so as to avoid moiré image effects.