Thanks, Mark. I didn't do much with the blue other than a vignette in Multiply blend mode, which tends to increase saturation, but that would be in the corners. I wonder if the iPhone pops the saturation in jpegs (which this was). It does pop, however, and the sky was incredibly blue with puffy clouds. This was part of a series of experiments to test the adage, "The best camera is the one you have with you."