The combination of brown pants and a top can be chosen according to personal preferences and occasions. Here are some styling suggestions:1Dark tops: Choose a dark top in a dark color such as black, dark gray or dark blue that can contrast with brown pants and accentuate the layering. At the same time, a dark top can also make your overall look more calm and elegant. 
2.Light-coloured tops: Choose white, beige or light grey tops that can create a soft contrast with coffee-coloured pants for a fresher and brighter look. In addition, a light-colored top can also brighten the skin tone and give your overall look a more youthful look. 
3.Tonal tops: Choosing tops that are the same color as your brown pants, such as light brown, dark brown or beige, can create a harmonious, unified visual effect while making your overall look more premium and stylish. 4.Patterned tops: Choosing tops with patterns, such as stripes, checks, or prints, can add interest to your overall look while also breaking up the monotony of solid pants. 5.Knitted tops: Choosing knitted tops can give you a warm and comfortable wearing experience, while also adding layers to your overall look. 
In short, the choice of brown pants with a top needs to be chosen according to personal preference and occasion. No matter what kind of top you choose, pay attention to the combination of colors, materials and styles to create a fashion look that suits you.