Actually, ME2 had this problem too in some environments.
For example, here Jade actually has red hair, and yet in that scene it looks like she has the same hair colour as Alyxa (who is supposed to be brown haired.)
But yeah, the difference is greater in ME3. Personally I just switched the hair colour to the "new" red hair setting which I'm pretty sure is the same as the new default femShep's. Don't have any good screen shots to show off the difference. She's my main shep and on my first playthough of anything, I almost never remember to hit the screen grab button.
However, while rummaging around for one I did come across this, which I think is just begging for a caption! Dredd reference perhaps?
Oh and while we're at it, why not all share our final photos from Citadel?