The colors would be arbitrary, assigned by the artist. A car that was blue in the filming could be painted as red car, a yellow house could be painted as a green house in the colorized film.
In these space photographs the colors usually map precisely to a physical reality, just as the shades in this picture...
...map directly to the electron "image" formed in a scanning electron microscope.
http://en.wikipedia.org/wiki/Tardigrade
On the other hand, sometimes scientific images are "colorized" for illustration purposes...
... but that's not generally true for astronomical images where color information is available.
http://apod.nasa.gov/apod/ap130306.html
My own world is a blurry place when I'm not wearing my glasses, but that doesn't mean the "actual" view is blurry.
The Hubble telescope acts as a pair of glasses for the human race. What colors it "sees" and how they are translated into photographs is a fairly accurate reflection of the reality, well, except for the four point "lens flare" of the brighter stars.
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