Man, the color is the easiest part. I’m more impressed with the reflections of the synthetic effect being in their sunglasses. As far as the colors, that’s pretty basic. There are many ways. You can use curves or hue/sat set to colorize or use colorama. The key for the glowy stuff is duplicating layers blurring them and using ADD transfer modes back on top of each other.
But if you are an ad agency producer asking a post house that owns a flame how this is done, then yes the answer would be “only in a flame”. But everyone else knows it can be done in AE. But like I said, the color part was not a big deal, it was the other stuff that was the amazing part.