Color change? That's not usually a sign of JPEG compression. How are you saving the images? It kind of sounds like a colorspace issue. I had the same problem when I first started using AdobeRGB as my colorspace. Was saving as JPEG and there was a serious shift in colors. I found I had to convert my colorspace to sRGB first to get a good approximation. The biggest problem is that if you save for web, you will never get the exact colors because web browsers don't color manage. -=>Donald