I have an image that is black and white, and I want to color parts of it with a brush. However, when I try to change the color, it won't change -- it jsut changes to a different shade of grey! What can I do?
Neither black nor white are colors so you have to use other techniques. Here is one way http://www.howtogeek.com/howto/42066/how-to-colorize-black-and-white-vintage-photographs-i n-photoshop/
Sounds like your file in is grayscale. Change it to RGB under Image>Mode>RGB.
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