Rather than admitting a mistake, I choose to go "full autism" and an exceptionally anal version at that.
As is scientific consensus in the study of dickology, the head generally has a color similar to the shaft with some exceptions. If you're black, it's black'ish. If you're light brown, it's light brown'ish. If you're Rudolf, it's red. The last point illustrates that when significant color variation do occur, a healthy dickhead will only be shifted toward the red spectrum or lighter/darker in general. It will never be shifted towards the blue spectrum. This is an evolutionary adaptation as red is associated with passion, health and youth while the opposite is true for blue. As an example just think of blue lips vs. red lips.
The shaft of this particular specifimen seems to have RGB (red, green and blue) values around [150,75,0] while the dickhead lies around [150,75,100]. This makes it blue in comparison to what it is scientifically supposed to be and thus an abomination of nature (ref. Dickingson, Cockham and Pecker; May 1872).