This paper deals with chromaticism and dissonance as seen in Arnold Schoenberg's early Lied, Schenk mir deinen goldenen Kamm. By espousing Edward T. Cone's idea of three dimensions consisting of harmonic language in tonal music, chordal vocabulary, succession, and progression, the paper distinguishes a radically chromatic idiom from a mild chromaticism that fits into traditional harmonic norms in the 18th to early 19th century. The former is originated from a discord between the three dimensions, whereas the latter marks an accord of the three. I have begun by summing up Schoenberg's own discussions of harmony as seen in his treatises Theory of Harmony and Structural Functions of Music for a logical clarification of his tonal idiom and then critically examined theoretical assumptions for Schenkerian background of the piece to suggest ways for modification. The opening passage shows a disagreement between chordal vocabulary, succession, and syntactical logics in stereotypical tonal idiom, while the second section features a harmony among the three dimensions. Exotic sound by whole-tone sonority proves to be adopted in traditional contexts of the tonal music. The rationales latent in harmony and disharmony among the dimensions have been cautiously considered in relation to poetic imagery of the texts.