The color matching of men's wear is generally like this: white is the assembly of white leather shoes; Black is to assemble black leather shoes; Silver gray with brown leather shoes; Khaki pants with brown leather shoes, blue jeans with light sports shoes or Martin boots, black jeans with dark sports shoes or Martin boots; Any color of sweatpants with non-fluorescent sneakers (fluorescent color is really difficult to wear temperament). Generally speaking, it makes people feel more comfortable if they wear it like this. Of course, other kinds of collocation are not excluded, but it may be very exotic.