Is there a reason why female Mormon missionaries wear such varied dresses but male Mormon missionaries wear uniforms?

Is there a reason why female Mormon missionaries wear such varied dresses but male Mormon missionaries wear uniforms? I see male missionaries often. They are easily recognizable, because they all wear uniform outfits - white t-shirt, black pants, and a clean tie to finish. When I go on the Mormon site, the dress code for men seems more varied than what I previously thought, and the dress code for women is not only more varied but also more colorful and vibrant. My question is, is this true? Do Mormon missionary women get to wear more varied and colorful clothing than Mormon missionary men? And why do the men on the website wear more varied clothing with different-colored ties but the men on the street wear *exactly* the same style?