Off-white is light, which is particularly easy to get dirty, while red is dark, which is not easy to get dirty. However, everyone's evaluation criteria may be different, including the effect determined by personal preference, because he may be able to tolerate his favorite color, and the degree of dirt is different.

Fancai, dark gray, brown, crimson, dark green and navy are more resistant to dirt. One of the three primary colors of red, the most powerful color, is also a symbol of enthusiasm, liveliness, passion and celebration.