Save as jpeg color problems?

I've been having some trouble creating .jpeg files of parts.  When I make the file, the colors are all wrong.  In one case the colors became more green, in another the image came out red or black, depending on how the part was colored. For the last part the colors just came out "off", it's hard to describe it.  All three parts have multiple colors, and the backgrounds don't seem to be affected.  I'm using Solidworks 2012, and I have been making jpegs of an assembly that all turned out correctly colored.  The issue seems to be only with individual parts.  Thanks for any help.

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