Keep in mind the images right now are just a concept image, we yet to see photos of the actual keys.
Then again keep in mind photos are heavily effected by color distortion. The type of camera used, film (if applicable) the lighting used, Printing quality, ink paper, or even your monitor and video settings can set off color too. Incandescent light make everything have a orange tint while florescent lights make things look more blue/ pale. Even natural Sun light isn't pure white, natural sunlight make things look slightly yellowish (the sun is yellow).
It is why people who design keycaps, color matching for paint and ect often get color samples for comparison.
The shade of red used in the sample image isn't necessarily the same red the plastic is going to be. Also isn't the key caps a dark grey and not actual black.