Regarding colour perception: yes, it is proved we all see colours differently. Something to do with the differing amount of cones in the retina (I think it is the cones, but it might be the rods!) of each individual. I learnt it a long time ago, when I was studying to be a nurse. There must be even better info on it now.
I see the point of your birth example, and you may well be right - but my tiny brain just finds the profundity of knowing so much utterly mind-boggling. I cannot do more than dream of the thought of the concept...
To KNOW would be godlike... Hence my comments!
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Smile! Life is too short for bitching
Fljotsdale