AITA for asking my girlfriend to not wear indian clothes to work.

I (27M) am American and my girlfriend (28F) is British and ethnically half Indian. She is not religious and culturally very British, speaks with a British accent etc.
We live in the US and recently started living together. She works at a tech company. I noticed about half the days when she goes to work, she dresses in Indian clothes, even her heels are shiny gold or silver. The look is stuff like this. She looks really cute and I think it is fine for a party or festival, but it looks really out of place for the American workplace.
I have Indian friends in American and the women dress western here except for festivals.
I told her to tone it down a bit as it looks out of place in America and she might face discrimination and some of the heels look too unprofessional for the work place.
I work at a bank and everyone is dressed really formal.
She got upset and told me she will wear whatever she pleases and is acting cold towards me. I did not push it as ultimately it is her choice and she can face the consequences.
Was I the AH here? She does not even like India and criticizes the place all the time and the politics there and she identifies as British.