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There will be times when you need to change the color of a photographic object and you don't want to just paint over it with a solid color. Instead, you want to retain the tonality in the underlying image. So for example, let's say I wanted to change the colors in this blue shirt. It would be hard to paint those colors in because there are so many other little details here. In that situation I will use the Replace Color command. That command is located under Image > Adjustments > Replace Color.
The Replace Color dialog box looks a lot like the Color Range dialog box that I talked about in another movie. What you can do here is take this Eyedropper and click on a color and that begins to select it as you can see here in this tiny black and white preview. If you didn't get all of the blue in that one click, you could select the Plus Eyedropper and click elsewhere to get more of the blue. You can click either in the image or right here in the preview. You also can move the Fuzziness slider back and forth to control the range of colors that are selected.
So I can see I have something selected that I don't really want back there. So I am going to drag the Fuzziness slider to the left to try to remove them from the selection. That looks pretty good. Now when I have that area selected from right here in the dialog box, I can move the Hue, Saturation and the Lightness sliders to change the color of the selected areas. So for example, I might take the Hue slider and drag to the left to change all the blue in the shirts to green, or I can go the other way and change everything to red.
Now I see that I don't have all the blue selected. So at this point I can still come back in with that plus eyedropper and click on these other areas of blue to add those to the selection so that the red fills them as well. I could also try to increase the Fuzziness or the range of blues that's being selected, and that does a pretty good job right there. I also can change the saturation of the replacement color. Dragging the Saturation slider to the right, makes that red more saturated and going to the left makes it desaturated and I can choose the brightness or the darkness of the replacement color.
So you can see that the Replace Color command can really come in handy. It does a pretty good job of changing color that's surrounded by lots of other details. I am going to click Cancel and I want to mention that there are a couple of other ways to replace color in Photoshop CS4. One thing you can always do is take the Brush tool, go up to the Options bar and change its blend mode to Color. These blend modes are just like the ones in the Layers panel and the ones in the Fill dialog box that I have talked about in other movies and with a brush like that which I will make bigger by pressing the right bracket key you can drag and paint over a color, replacing the color by retaining the tonality below.
I am going to undo that by pressing Command+Z or Ctrl+Z and I'll show you one more way to replace color and that's to use the Color Replacement tool. I am going to switch my foreground color to red again and I am going to click on the Brush tool and from the fly-out menu, I will choose the Color Replacement tool. This tool samples the underlying color and replaces just that color when you click-and-drag. I am going to leave all this settings here set at their defaults except this one that says Contiguous. I want to change that to Discontiguous and that will help me to paint in these tiny areas here.
Then I am going to increase my brush size and if I click with the crosshair here on yellow and paint, you can see that the color carries over in between all those other embroideries and even behind the hanger here. So that I can get in and replace the color in all those areas without having to spend a lot of time painting spot-by-spot. So that's yet another way to replace color. You can try using this Color Replacement tool, you can try painting with the Brush tool set to Color mode, or for what I think are the best results, you can try using the Replace Color command.
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