The covers you replaced are the actual covers, perhaps saturated with the colors off, but the actual covers nonetheless. The image you replaced them with are photographs of the singles. There's a difference. if you can maybe find a way to scan the covers of those singles, or maybe find a version of the actual covers with more accurate colors, that would be good. For now, I think it will be better to restore the covers to the way it was before, and then when you have those better covers, you can replace them.
Sorry if I didn't explain it well, if you need more clarification for what I just said, I can try to explain my opinion again. I have work though, so I won't be able to get back to you for several more hours.