If you thought the pure white Nexus 5 looked too good to be true, you were right. It was nothing but a bit of color manipulation from the render of the black Nexus 5. This isn't to say that there will not be a white Nexus 5, just that it is more likely it will be two-tone (white back and black front) as we saw in an earlier leak, and as we saw with the white Nexus 4...
Source: http://www.phonearena.com/news/Pure-white-Nexus-5-is-bogus-but-leads-to-plenty-of-other-colorful-fakes_id48485
Source: http://www.phonearena.com/news/Pure-white-Nexus-5-is-bogus-but-leads-to-plenty-of-other-colorful-fakes_id48485