I'm trying to edit the colors used in a small image file and have no idea how to get started (Photoshop 7.0). Although the file looks fairly simple (white background + four prominent colors used in text and in graphics), I tried swapping colors with a much simpler program (Snagit), and it turns out there are subtle little shades of the four prominent colors. So I'm hoping for a way to select an existing color, select a color to replace it with, and have everything close to the existing shade get replaced with close parallels in the replacement shade (so things a little lighter in the original, get replaced with a slightly lighter shade of the new color).
I found the "Select" | "Color Range" tool that definitely supports the selection of one of my color ranges with a "fuzziness" slider, but no idea where to go after (or before?) that. Sorry, but next to no skills in Photoshop.
Thanks for any specific sequences I might follow-