Here's how it's done:
- Open a photo in Photoshop (or Elements) that has a boldy-colored object you'd like to change to another color. Crop the image first so that you're only working with the composition you're going to keep--no sense getting distracted by image areas you're going to toss later anyway.
- Open the layers palette (you should always work with the layers palette open). Now, open the hue/saturation tool in the layers palette so that it opens a new layer (just click on the half-black circle at the bottom of the layers palette if this is new to you--and you will see the hue/saturation tool in the list of options).
- At the top of the hue/saturation dialog box, you'll see a pull-down menu labled "Master." Click on that box and a list of the main colors will drop down. Choose the existing color of the object you want to change. In this case, because the portion of the floats that I wanted to change was orange, I chose red because that was the closest color option.
- Now look down to the bottom of the dialog box and you'll see three eye-dropper icons. Click once on the left-most block to tell Photoshop that you'll be sampling a color. Now move your cursor over the color you want to change (again, for me it was the orange area) and click once. If you want to gather more variations of the color, click on the "plus" eyedropper icon (the middle one) and then click as many more times as you want. Each time you click you are broadening the color that Photoshop is going to alter--but you should only click on related areas of the subject. In other words, if you're working on a blue dress, you might see various different shades of blue (because of lighting or shadows, etc) and if you want them all to shift to another color, you have to sample them all.
- Now slide the hue slider and watch what happens! Only the objects that were the color(s) that you sampled will change--but you can alter the hue as much as you like. I could have easily turned these floats blue or purple or green just by sliding the hue adjustment. Wild!
Is this a cool trick? Try it! Again, for your first experiments, try something that is obviously one color--like a your yellow car. If you want to see how it would look blue or green or pink--it's just a few keystrokes away. Have fun!