I've been on E for almost 5 months now and one of the things I didn't expect from it is that wow, everything in the world is really pretty now! The sky looks nice! The trees are great! I never loved the changing colors of the fall leaves before but they're so much prettier than they were before? I need to spend more time in nature now, this is great! Is this something anyone else has ever felt?
There's some evidence to suggest that cis women have greater color perception than cis men do. You are not the only transfem that has attested to this and you won't be the last either, it happened to me too. There are anecdotes about the reverse happening with people on FTM HRT, so there may be something to it. Too bad there's no way to quantify the change unless one were to have already taken some visual acuity test with a color component pre-HRT.