Well you don’t see Yellow in Webdesign every Day. With a wavelength of 570–580 nm yellow is, as is light with a suitable mixture of somewhat longer and shorter wavelengths. Yellow’s traditional RYB complementary color is purple, violet, or indigo, while its colorimetrically defined complementary color in both RGB and CMYK color spaces is blue. I went on a Big “Find Yellow Websites” Journey. Hopefully i could motivate some Web Designer out there to use the Color Yellow in one of their next design Projects.
(some information from Wikipedia)