Though "her" comb is getting pink in it at the base, but the few shots where it looks REALLY pink is because of the red heat lamp they are under(I actually had the lights off while taking these pics with flash on... the colours turned out great surprisingly))
I had the same scare with my cuckoo marans a while back. Yours looks exactly like the one I was concerned about. Mine ended up being a pullet, so I'm pretty confident that yours is too
Just curious what your Maran turned out to be? I have a three week old that looks exactly like yours did at three weeks. I was told it was a pullet. Thanks in advance.