Somewhere down there in Silicon Valley / San Jose is California’s 15th Congressional District, represented by Congressman Mike Honda, O.K. fine.
Now, this is, or used to be, or still sort of is his official photo, possibly taken in Washington D.C., possibly a digital image that got scanned in, O.K. fine.
Now, was he wearing a white shirt that day? Honda in Bleu:
Oh, here were go. This alteration assumes he was wearing a white shirt and that his white hairs are, in fact, white, or colorless or whatever you want to call it. A few clicks yields:
Probably a bit on the purple side but oh well.
But this is what a professional illustrator did, taking things a bit further, white balance-wise and clicks-wise:
Point being, you can’t just scan in a photo and call it day, you gots to make sure that white is still white.
That is all.