The color blue corresponds to [[wavelength|wavelengths]] of 435 nanometers to 500 nanometers in the [[electromagnetic spectrum]].<ref>http://hyperphysics.phy-astr.gsu.edu/hbase/vision/specol.html#c1</ref> | The color blue corresponds to [[wavelength|wavelengths]] of 435 nanometers to 500 nanometers in the [[electromagnetic spectrum]].<ref>http://hyperphysics.phy-astr.gsu.edu/hbase/vision/specol.html#c1</ref> |