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It's very difficult for us to give you an accurate answer if you do not post the image.
Otherwise take a look here: https://www.google.com/#q=Photoshop+color+removal

First, a very Happy New Year to you and all members, and all the best for 2015.
I recopy a photo which has heavy maganta color. I shoot in raw.
How do I remove the magenta color?
I enclosed here with the photo and hope that you can suggest something to remove the magenta colour.
Sorry for this late reply.