Morphs change shape - you are talking about material settings with a texture set.

If you do get odd colour casts it's worth checking to see if there are DAZ Studio material presets (.ds or .dsb files) as well as the Poser mat poses (,pz2/.pzz), as the former will usually give better results (occasionally they won't as no adjustments have been made). The actual materials listed will depend on the figure - you will probably want to select all of the skin surfaces plus lips, nipples, eyesocket, lachrimal and possibly the nails. There are other chnages you can make - if you go to the Advanced tab of the Surfaces palette and scroll down you can change the Lighting model setting to Skin for the skin surfaces (in which case you may want to keep a touch of blue or cyan in the diffuse colour as it can give a bit too much red) and perhaps to one of the Glossy settings for the nails and eye surfaces.