Now your task is clear, the same technique is used for every other object in the picture (with different curves of course). So I'll just quickly run through the rest.Next I'll do the background. Same technique, select, quickmask, blur, edit, reselect.Once again, Layers -> New Adjustment Layer -> CurvesYour curves dialogue will come up again. I wanted a blue color, so I raised the cyan up alot, raised magenta a little and dropped yellow a little. I also wanted it to be lighter, so I dropped the CMYK curve down a little. I actually used multiple point curves, but I'm keeping it simple.The curves:Result: