Hello Atemp,
I cannot be sure of my answer but I can make a parallel with some other status we use in French. Actually, it seems that the Academie Française used to consider that wome works would be impossible to do for women, so that we do no need a feminine gender for them. For example, nobody uses the feminine version of "docteur". And when I was a child, we said "le maire" even if it was a woman. Now we say "Madame la maire". Anyway, I would say "mon colonel", like we say "Bonjour Docteur"....
I hope my answer helped you a little bit.
Have a good day!