LOL! No, John, no.
This is a picture that John Barrowman posted on his Twitter account. His 50th birthday is March 11th & he shaved off his hair to show everyone what his hair looks like when not dyed.
Strange enough, he actually looks younger! However, to be honest, I do not like the short, burr look on him. Especially, the white hair.
I've always loved John's hair a bit on the longer side (episode, Countrycide, for example). And, if he ever wants to reprise his role as the Immortal, Extremely Slow-Aging Captain Jack Harkness, this look will simply not cut it. So, back to black or dark brown. Hurry!