It's not exactly in colour, every pixel is in a value form which could be considered greyscale, but it knows which ones are which colours, red green and blue, but the bayer filter filters out the colours for each greyscaled pixel.
I was about to say The Red cameras released a version of their camera with no bayer overlay, but then I looked at the link first posted and I think that's what it is talking about.
I did hear something, it may just be hearsay, somebody carefully scraped the bayer colours off their sensor.