Right now I have an image in which I have selected all the black. I've got the marching ants selecting all and only the black. I would like to change the black to brown (HEX#B16A23, R 177 G106 B35). How do I do that? I thought it would be as simple as clicking on the foreground color box, but of course that didn't work.
So what do I do next?
Ultimately I would like to replace the black with a vertical gradient of 2 browns. So if it's possible, how would I do that? But first of course, the change to a solid color.