Imported "Dead" Images

I’m having some trouble keeping the images I’ve placed in Flash looking vibrant and colorful as intended. When I save for the web through Photoshop and save a high quality .jpg it looks great, just as the original. Once I import the image into Flash it looses its contrast and looks desaturated. I’ve tried many alternatives (.gif, .png, different color modes and adjusting saturation and levels) and the only one that works is adjusting the saturation and levels. The only problem with that is its subjective and I have to guess what the amount of each should be. Has anyone had this problem and/or can anyone suggest a solution?