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Change from one colour to another

Nov 22, 2010, 09:37
Post: #1
Change from one colour to another
Hello, I was wondering, using Gimp, is it possible to change a colour in an image from one to another? For example if I have a yellow helicopter then can I do something so that I turn the yellow to red, with the shadows in yellow also turned to shadows in red?
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Nov 22, 2010, 13:37 (This post was last modified: Nov 22, 2010 13:45 by ofnuts.)
Post: #2
RE: Change from one colour to another
Best technique I have found:

1) duplicate layer
2) use Colors/Colorify on the bottom layer to obtain a black& white-recolorified version of your picture, where your chopper would have the new color.
3) on the top layer, making a lasso selection around the helicopter if you want to restrict the color changes to it
4) use Colors/color to alpha, and use the color picker to select the helicopter original color in your image.

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Nov 22, 2010, 14:19
Post: #3
RE: Change from one colour to another
(Nov 22, 2010 13:37)ofnuts Wrote:  Best technique I have found:

Thanks, those steps worked great. Just a question. Why the need for step 1 and 2. Can't I just use Colors/Colorify option on the first image to give that the colour I want?
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Nov 22, 2010, 15:12
Post: #4
RE: Change from one colour to another
No, as you have seen "colorify" changes you image to B&W and then colors the white. The other colors are lost. In fact my technique doesn't work that well if you have too much variation on the color you want to change.

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