Changing every instance of a color with another.

I wish to change every instance of one color, on an image, with another color.

For example, I have an image that is covered with orange text that isn't aliased. I know the number of the color and the color I wish it to be changed to. Is there a filter that can simply change all instances of RGB with RGB or something along those lines?

Thanks,

-Limitz

Make a selection using the hex/rgb whatever values you wish of the colour you want to replace, add a new layer and fill with desired colour.

Or am I reading this too simply?

Color range. Never thought of that.

Thanks