2. Blue shoes+light beige pants. Although this color collocation spans a lot, it will not affect the aesthetic feeling. Because beige trousers are slightly thin, blue shoes can just make up for the color sense.
3. Blue shoes+crimson pants. This is a very colorful gradient, which can make people look bright.
4. Blue shoes+blue jeans. This match is a perfect match. But remember, the color of pants is half a color lighter than that of blue shoes, so it looks layered.