As always when as king a question about hunting, the correct response is to ask the hunt secretary.
As far as tan boot tops go, the very traditional view is that they were worn by gentlemen with colors when wearing their colors. Women with colors wore the patent leather tops when wearing their colors. The very traditional was that women wore the standard melton with the collar colors. Over time some hunts have allowed women staff to wear scarlet as well. I have no problem with that.
I agree with the above comment that there are two many people wearing scarlet in the field. When I first started hunting many decades ago, I asked the master how one got colors. The answer was that you had to be competent enough in knowledge of the territory, of hunting, and riding ability to step in and lead the field or staff. So it was pretty limiting. It was basically a way to designate in the field people who were capable of leading in case of emergency.
Hunting has evolved and not everyone who hunts owns land. Many members come out from the suburbs to where their horses are boarded and then hunt. Hunts have evolved to reward members for other significant contributions to the hunt sometimes including money (buying your colors). Many hunts now award colors for non-hunting contributions to the hunt.
Personally, and I have my colors, I wish it was really just masters and staff wearing scarlet in the field. I think the specialness of scarlet has been worn away from people who ride badly, don’t really know anything about hunting or don’t even know the territory but instead are wearing scarlet because they are good at organizing balls, show up for every work party, etc. These efforts should be significantly recognize but not with a scarlet coat.
Old crotchety man vent over. Git off mah lawn.