Those are JUST the case colours though. Sony and have pretty much gone all blue for branding, Inc vita. Nintendo are more white than anything else, but 3ds case is white, logo is red, main mascot is red, wii u games are blue.
Just saying that's how I think of it as. I've always associated PlayStation with red, although they have recently taken a liking to the dark blue color. Nintendo is also known to be red but their branding has been everywhere from rainbow to purple to primary colors to purple again to white and now light blue.
In the end, it's only a bar graph.