Photoshop: is it possible...?

to remove all the pixels of a certain color from a picture or to change all the pixels of a certain color to a different color? if so how?



e.g. lets say you have a high contrast picture of a girl's silhuoette. the only colors in it are red and black. can you make all the red ones green or something?Photoshop: is it possible...?
yes just select the area in question and use hue saturation to change the colour



Anything is possible in Photoshop - you just need to watch a youtube demo to see how to do it.Photoshop: is it possible...?
You can add a gradient map to change the colours.
you can do that via color levels and lowering increasing the color. although im no pro so i dunno if thats possible, but hey its photoshop, it can do the impossible!!



we just have to find out a way to do it.



a gradient overlay would also work but its harder and it changes the ALL the colors globally. try getting into channels.
Select By Color Range and use the Fuzziness Slider. Use a layer adjustment to change the color.