It’s a technique known as transposition, or color shifting, so a photo of a red car becomes a photo of a green car, or an image of blue dress becomes an image of a red dress. How do you make it happen on a Mac?
Expensive And Complicated? Or, Not?
The same effects can be created in Photoshop, of course, but the number of steps to shift colors from one to the other are as notable as the price and complexity of Photoshop itself.
There’s a better way, a Mac-like way, and it’s easy. The app is called HueShifter and all it does is what you want. A shift from one color to another color of an object in a photo.
If you know about hue, saturation, and lightness, then you’ll have no difficulty transpositioning an image from one color to another.
If you know absolutely positively nothing about color, but you think the technique is cool (and it is), the HueShifter is what you need.
The trick to using HueShifter is the balance between selection masks and color dimensions– hue, saturation, and lightness, with hue being the color, saturation how deep the color is, and lightness how bright the color is. Here’s an example.
The blue portion of the image above can be changed with a simple mask of the area you want to change, and then adjust the color using the HueShifter slider tool.
That’s about it, but you’ll need to perform some trial and error effort, both to get the mask layered just right, and to select a matching but different hue.
HueShifter is a good Mac app citizen and works with drag and drop and copy and paste to get images into the app. It even supports images with alpha and keeps color profiles embedded so you can use the image with other apps, including Photoshop.