The way I (and, a lot of us) look at it is from an artistic standpoint and not from a scientifically-correct one.
Produce what looks good to your eyes. As long as it's within reason. i.e., you don't turn pinks to purples and blues to greens, and, so on.
I personally consider astrophotography an artistic pursuit.
Don't worry about getting too caught up in correctness.
Of course, if you really wanted to, you'd go down the monochrome CCD path and then colour balance your images with a known G2V star.
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