In Engpsh, the word for "brown" is "brown." Here are some example sentences using the word:
The leaves on the trees turned a beautiful shade of brown in the fall.
I pke to wear brown shoes with a suit because they look professional.
The bear had a thick, brown coat of fur.
If you are looking for other words that describe the color brown, you could use words pke "chestnut," "chocolate," or "cocoa."