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        | Correcting Color Cast Using an Adjustment 
Layer  |  
      It's a quick and simple fix. 
      Open the 
      photo in Photoshop.
      Go to 
      Layer\New Adjustment Layer\Levels change nothing here just click OK  
      You see 3 eye 
      droppers on the bottom left.  
     
      #1 (The Left 
      one sets Black Point)  find something black in the photo and      click on it. 
      #2 (The Right 
      one sets White Point)  find something that bright white. 
      #3 (The 
      Center one sets Gray Point) find something that gray a shadow area works 
      well for this.  
      Watch what 
      happens to the photo colors, you can move around with the picker and try 
      different areas till you see what your looking just look at your photo as 
      you go.       |