We'll start at the low end of the color spectrum with black (yes, color nerds, we're tackling this one subtractively). The color without any color has adorned many a base-edition, because we're talking about products historically targeted toward people who think colors are a bit "fruity" (ie defensive pre-teen boys). This same demographic are also likely to buy your console if the only alteration is making it smokey gray, or putting a little logo on it somewhere.
However, if you want to get technical about it, the first Japanese Sega Master System was white, making Sega's subsequent line of badass-black reissues some of the company's first alt-color editions (whereas you could have a Genesis in any shade you liked, as long as it was black). One Game Boy Advance SP comes in black, emblazoned with the challenging legend “WHO ARE YOU?”; the beer-themed PSP, given out to Stella Artois reps a while back, disappointingly chooses a muted black over bottle-green, beer-amber, or hangover-vom puce.