Pants and trousers are pretty much the same. Khaki is commonly used to describe a colour - a brownish beige. Chinos are a specific kind of cotton trousers first worn as fatigues by the military, I believe. Khaki is one of most common colours for chinos.
Check out Muji and Uniqlo for beige chinos.
Check out Muji and Uniqlo for beige chinos.
Looking stylish has always been hard work