Changes

'''Blue''' is one of the three primary pigments, along with [[red]] and [[yellow]], and one of the three main colors of light along with red and [[green]].  With [[pigment]]s, such as with paint, blue is combined with yellow to make [[green]], or with red to make [[purple]].

'''Blue''' is one of the three primary pigments, along with [[red]] and [[yellow]], and one of the three main colors of light along with red and [[green]].  With [[pigment]]s, such as with paint, blue is combined with yellow to make [[green]], or with red to make [[purple]].

In US [[politics]], blue is the color of the [[Democrats]]. It is sometimes associate with wealth, such as in the terms [[blue blood]] and [[blue chip]].  Elsewhere in the world the colour blue represents [[conservatism]].

In US [[politics]], blue is the color of the [[Democrats]] starting with the 2000s. It is sometimes associate with wealth, such as in the terms [[blue blood]] and [[blue chip]].  Elsewhere in the world the colour blue represents [[conservatism]]. Blue was also used for the colors of the French Revolutionary radicals, and to a lesser extent the Blue Ants of Mao Zedong in Communist China.

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