Aziz: nobody would call people from Pakistan yellow. They tend to be brown. It's Chinese people who are referred to as yellow. Which they are: it's a matter of definition really, the word "yellow" is a word that, among other things, means "the colour that Chinese people tend to be". As I say, you may or may not feel that's is offensive, but it's not something you can really deny. Some are a browner kind of yellow, some more yellowy yellow. I know lots of them.