When the mother of a friend was widowed, she asked her Conservative rabbi if she could stop covering her hair in shul (being Conservative, she had not covered her hair every day). He said it was permissible for her to go uncovered which is what she had been hoping he would say.
Most aspects of Jewish observance vary in implementation by community. "Dress codes" especially vary, and not just by movement. There are more liberal shuls where the standard of dress for synagogue is more formal than that of more traditional shuls. I was amused to find that at the Orthodox shul that some friends and neighbors attend, the women mostly wore skirts that are just barely over their knees when they are standing. So I suppose I looked rather dowdy to be wearing a skirt that was down to the mid-calf. But in other Orthodox communities, the women all wear skirts that go all the way to the floor. In my minyan, most women wear skirts to the mid-calf, but some wear shorter and some wear floor length (and the same woman might vary week to week), and perhaps one or two might wear pants (including a woman who is a rabbi whom I have never seen in a skirt).
There are also weird minhagim that have nothing to do with Halacha, such as the color red being thought of as "immodest" for women to wear in some very right wing Orthodox communities.
You should take into account that many Orthodox rabbis will state as an absolute something that is not done that way even in other Orthodox communities. For example, wigs are not permissible as head cover for married women in some Orthodox communities, even though they are considered the "proper" head cover for married women in others. Conservative rabbis are more likely to tell you that a range of opinions is permissible, but respect for multiple opinions (which is not the same as saying that anything is OK) is an important aspect of Conservative Judaism.
