Changing skin colour may be as easy as fish
And look, there goes that surrealist changing a light bulb joke again.
As for my take on this, I've had this one floating around my pile of future societal changes for a while. Essentially, that the current interest and promenience of tattoos combined with the growth of an affluent group of people who through a use of tanning products and makeup are actually bright Orange.
This would all reach a logical conclusion when people could change their entire skin change to something like green or blue. Or mixtures, like some of the cheap alien makeup in Star Trek:TOS.