I didn't really push the colors TOO far in any direction since right off the bat I knew pretty much how I wanted the finished image to look. I did end up making the greens/yellows considerably more bright/punchy/saturated, and I love the final look of the greens with the blues. I layered up a couple "selective color" adjustment layers, as well as a "color lookup," and a "channel mixer" adjustment layer to pop the blues a bit more and also warm up the background just a tad to give him and the orb more separation. Speaking of channels, I also made use of the blue channel while coloring so I could make a selection of just the blues in the image. If you go to the channel tab (usually under your layers tab) and command-click on one of the channels, it will load the luminosity of that channel, kind of like a selection of all the pixels of that color. I then used my blue channel selection to add a layer mask to some adjustment layers in order to apply color moves to just those pixels.