How do you say she has brown eyes in french?

There are a couple of ways to say "she has brown eyes" in French, depending on the context and level of formality:

Formal:

* Elle a les yeux bruns. (This is the most common and formal way to say it.)

Informal:

* Elle a des yeux bruns. (This is slightly more casual and can be used with friends or family.)

You can also use the verb "avoir" with the adjective "brun(e)" directly:

* Elle a des yeux bruns. (This is also informal.)

* Elle a des yeux brunes. (This is also informal and more common in French.)

The choice between "les yeux" and "des yeux" depends on whether you want to emphasize the eyes as a singular, definite entity (les yeux) or as a general characteristic (des yeux).