Hi,

I have a photo and part of it is red. I want to change all red color pixels in that photo to blue. How to do that?

thanks.

Image>adjustments>replace color.

Bob

How exactly do that? When I open the photo, it is all displaying grey to black shades. I selected red color. But where to select blue?

thanks.

Also, select>color range. Then use the eyedropper tool and adjust the fuzziness so that you have all the red selected (what is selected is shown as white in the picture in the dialogue box) and then click "okay."
Then, with the red selected on the picture use the color palette and choose the shade of blue that you want, and press alt+backspace (at the same time). This will change all of the red pixels to blue. Hope that helps.

Try hue/saturation- when the box opens-change the choice at top from MASTER to REDS, and then slide the hue slider for any variation you so desire.

there are a lot of ways...