The bottom of a bikini is the part of the swimwear that covers the lower torso and hips. Bikinis come in a variety of colors, including brown. Brown can be a warm and natural color that complements many skin tones. When choosing a brown bikini bottom, it's important to consider the cut and style that best flatters your body shape and personal style, as well as the material and quality of the swimwear to ensure it will hold up to water and sun exposure. Additionally, it's a good idea to choose a brown bikini with a neutral or complementary color for the top to create a balanced and cohesive look.