What color is the universe? If you could hold the entire universe in the palm of your hands, what would it look like? Apparently scientists have asked this question too, and by measuring the light from 200,000 galaxies from a large volume of space, astronomers have put together a rough idea of what color the universe is. Of course there are many colors that we humans cannot see, so these astronomers used the data that applies to the human eye.
There are other problems that arise too. Under what illumination will we be viewing the universe? From their findings, under illumination D65 (close to the illumination of the setting sun), the universe appears reddish white, and under indoor lighting the universe appears blue. According to these astronomers though, the best answer is close to white. That's why the illumination factor plays such a strong role.
To me, this information seems naturally flawed. If we don't know the size of the universe, how can we determine its color? 200,000 galaxies seem like a lot to us, but do we know this is a good representation? Either way, it's extremely interesting and can probably tell us a lot more about the universe.
Source: http://www.pha.jhu.edu/~kgb/cosspec/
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