There's a .black TLD, and according to ICANN:

"It is important to note that the intention of the TLD is to be associated and used for association with the color black, and not with any social, cultural, or ethnic connotations."

There's also a .red, .green, .blue, and .pink. There is however, no .white.

I find this intriguing if the intentions are truly based on association purely with the color, and not with any "social, cultural, or ethnic connotations", considering the ENORMOUS amount of TLDs put in service over the last decade.