Hi, long time lurker, first time poster. Upon my daughter’s birth this past May, I was at first taken aback by the decibel level those tiny lungs could produce. After the initial wave of emotion settled, and I held her for the first time, neither I nor my wife could believe what we saw. She had red hair, and after finally opening them, bright blue eyes! We are two very brown eyed people(I am of Polish descent and my wife is Japanese). I should note my mother is blue eyed and my father has dark eyes and dark hair. I have reddish hair, not what one would refer to as “red” in any manner, however. I believe it is a common childhood trait for caucasians to be born with lighter features which gradually become darker through melanin production and deposition(anecdote,no cite) but I thought this would be trumped by the fact that both parents were brown eyed and that my daughter is half Asian. 10 weeks later, she still has blue eyes, but her hair is only slightly darker. Any amateur geneticists(or pros if we have any) care to tackle this one? Will her eyes stay blue and hair light? The color/shape combination is quite striking. And, more importantly, should I be suspicious of all my red-headed male friends? 
On second read I don’t know if this is a factual question to be answered. Maybe better suited to IMHO or MPSIMS. Mods feel free to move away or let it sink like a stone. Did I mention I’m new?
Ben
I am a fair-ish brown haired, green eyed Brit married to one of the darker, hairier type Japanese men.
When our first boy was born, on him emerging, the doctor didn’t say what sex it was, but “Ara! Kami ga akai!” (Wow! Red hair!) I have to say in my opinion it wasn’t that red, but it was a fairish ginger. He had slate blue eyes which were unusual enough to bring every SINGLE visitor to the hospital to our room for a good goggle. He was quite golden haired for four years and now has settled to squirrel-y brown/grey with undertones of green hair and his eyes are a dark brown with gold flecks. Quite exotic. In Japan he is considered very “Foreign” but in England he doesn’t look quite English, either. He has western eyes but is his Dad’s family through and through in character and build.
Our second boy was white blond (not gold and not true blond but sort of no colour…) for two years. This year he is more of a golden head with absolutely colourless strands interwoven with gingery brown. His eyes are golden brown. He is VERY “western” looking with his colouring but his eyes are Japanese and actually if you can get past the blond, he is the spitting image of his father.
Japanese dark haired blood does not seem to be very strong, despite our expectations, and it seems to dilute out to allow lighter colours to show through very easily. I have heard that redheads can show in a family of dark haired people, and most Japanese people’s hair is not blue-black but red-black when you look at it in strong sunshine.
It sounds to me like you have the most gorgeous baby who will provide you with many years of enjoyable speculation as to which bit of her came from who. (Be careful, I have a friend with 6 children because they are so fascinated by how one couple can go on producing unique kids from the same combination of genes…)
Congratulations - give her all the love she deserves!
Congrats on the chirruns, labmonkey and Hokkaido Brit! It sounds like a case of incomplete dominance of the darker-coloring genes to me – though we’re taught in Biology I that brown always trumps blue, etc., sometimes the reality is a bit more complicated.
A friend of mine has a little half-Japanese boy who is very Asian looking to my eyes, but then I’m not Japanese myself so I don’t know if he’s very Western looking to them. He’s gorgeous though, with black hair and eyes and pale skin.
If your mom has blue eyes, labmonkey, then you have a recessive blue eye gene. There’s half your answer on the eye question. The genetics of hair and eye color is fairly complicated, though, especially since, as you pointed out, they sometimes change as kids grow, so it’s hard to give you any kind of definitive answer as to how it happened.
There’s a neat article here on how human eye and hair color is passed on.
Actress/Model Devon Aoki has a Japanese father and a German/English mother. She has light brown hair and hazel eyes.
I guess I should have aimed this OP a little more precisely. I didn’t expect complete Gregor Mendel style dominance and recessivity, I guess the question I really should have posed is is it genetically possible for her to retain the blue(comparitively pigmentless iri(sp.) as she ages? In regard to my daughter’s hair, my wife essentially refers to anything not black as “red” so I guess there’s a good bit of opinion mixed in there as well.
Thanks for the input guys, Hokkaido Brit, your sons sound like beautiful kids…but then its quite a nice mix 
Thanks for the link Nichol!