I would say black and white because they match with more outfits. Thinks like brown or yellow only match with a small number of clothing items that I have but black matches with almost everything: you can wear it to a funeral, you can wear it to a concert, you can wear it to a job interview, you can wear it to church and you can wear it to work. With yellow there would be fewer possibilities. When I go to school - I always dress like I'm going to work.
I wear black, red, and blue the most often. It depends on where I'm going and what I'm doing. Sometimes I wear a pink and grey checkered dress shirt with beige pants, but other than that I stick to black dress shirts.
omg, I really don't know. I don't wear much yellow and purple. Underwear it's mustly black, pink and red. Trousers it's usually blue or black, with occasionally white. During the some sometimes some other colours. I have a lot of blueish, black and white tops, but I also have a lot of red but I don't wear those as often. Keep it at jeans-blue, black, white and light blue. But really sure is something I am not.