Matching Brown: A grout color that closely matches the brown tile can create a seamless and cohesive look, making the tiles the focal point.
Beige/Cream: Lighter grout colors like beige or cream can add subtle contrast, highlighting the shape and pattern of the tiles without overpowering them.
Gray: A medium gray grout can provide a modern contrast, especially with darker brown tiles, giving a sleek and sophisticated appearance.
Charcoal: For a bold and dramatic look, dark charcoal grout can add depth and make the brown tiles stand out.