A couple of good papers on this are attached.

Rapid determination of phenolic components in red wines from UV-Visible spectra and the method of partial least squares

By: K. Skogerson, M. Downey, M. Mazza, and R. Boulton

• identified anthocyanins, polymeric pigments, small polymeric pigments, tannins, non-tannin phenols, and total phenols

Wine Color Analysis using the Evolution Array UV-Visible Spectrophotometer

By: Gordon Bain, Ph.D., Thermo Fisher Scientific, Madison, WI, USA

• This one just has some good wine spectra, both red and white wines (pictured above)