Enhance > Adjust Color > Hue/SaturationAnd move the Hue slider. See also http://davekb.com/browse_computer_tips:gimp_replace_colors:txt
Computer Tips - How can I make a mostly red image mostly green using Photoshop?
Date: 2012apr13 Product: Photoshop Q. How can I make a mostly red image mostly green using Photoshop? (Change the color of an image using Photoshop) A. From the menu do: