What advice would you give your brother on choice of colour for a carpet?

I would advise my brother to consider the overall color scheme and style of the room where the carpet will be placed. If the room already has a lot of bold colors or patterns, it may be best to choose a neutral or solid color carpet to balance out the space. On the other hand, if the room is more neutral, a colorful or patterned carpet can add interest and personality. Additionally, consider the amount of foot traffic in the room and choose a color that will be able to hide dirt and stains well. Ultimately, choose a color that you love and that complements the rest of the room's decor.