Dress whatever you want, this idea of the french style is a myth.I wish someone would destroy all this stereotypes forever
Unless you are going to the fashion week, people in Paris dress like everybody else in the world. You will find all types of people, all types of colours, horrible coats, nice coats, bright colours, dark colours. Do you have any idea how many "foreigners" live in Paris? I'm portuguese and portuguese, there is almost a million, I can't walk in Paris without bumping into my compatriots, and I can guarantee you, you will not find a high sense of fashion among them.
And you would be hard pressed to point who is the true born parisian and the portuguese.