The white 40-STM (and the picture) is not mine, I saw it in the "40 STM" group on Flickr, that I am a member of. My own 40-STM is black, as well as the 100D.
But it's a real Canon product. The white 40 STM is offered in a kit together with a white 100D in Japan. The kit was launched late last year: http://www.ephotozine.com/article/white-canon-eos-100d-launched-23443
In Europe I have not seen the white 40 STM in stores (separately or in a kit). I do think the white version looks like a "tongue in cheek" statement to a tiny "L" lens, not to be taken too seriously.