This question might seem trivial, or even silly, but in the spirit of inspired independent research (and since I just acquired a red bike and have some time on my hands), I would like to assert that RED is the fastest color and the best color for a bike if one wants to go fast. My support:
It is widely reported that RED cars receive the greatest number of speeding tickets. Ergo, there is something about the color that increases one's speed. See: http://www.colormatters.com/BBArchiv...nchor-Do-23240
An internet search for the terms "red rocket" returns 60,200 hits, compared to 57,500 for blue; 24,500 for yellow; and just 24,000 for white [sorry, D.G., and I'm not going to include the number of hits for "black rocket" because it doesn't support my argument].
The color red produces less thermal energy than other colors. Since cycling is all about efficient use of energy, this means that red wastes less energy, thermally speaking, resulting in greater energy channeled into speed [disclaimer: I am not a real scientist]. See: http://www.colormatters.com/colorheat.html
Finally, Red is the "most emotionally intense color [and] stimulates a faster heartbeat and breathing." [source: http://www.infoplease.com/spot/colors1.html] In other words, red increases conditioning!
As a footnote, blue is the most "unpalatable" color, so if you want to lose weight, dye your food blue and put a blue lightbulb in your refrigerator.
Go with RED, it's the color to have if you want to ride FAST!