Libertarian Color
Various political parties in America are often asssociated with certain colours. This was the result of televised media, which assigned various colours to different parties so as to denote which party's presidential candidate which state in the electoral college.
History
Despite having received an electoral vote back in 1972, the Libertarian Party has yet to win an entire state's electoral votes in an election. Therefore, no colour has been popularly assigned to the Libertarian Party yet by the media.
Despite none of the major parties in America having officially adopted a colour, red has become associated with the Republican Party, blue with the Democratic Party, and green with the Green Party.
Yellow or gold is the colour most-often associated with the Libertarian Party.
Yellow
Yellow and gold have most likely become associated with the Libertarian Party for the following reasons:
A) yellow being associated with classical liberalism, and
B) yellow having the appearance of gold, which is itself associated with "capitalism" or the free market.
Official colour
Some have made calls for the Libertarian Party to adopt an official colour, but no action has officially taken place. The most popular demands include yellow, purple, and blue.
Purple
Arguments for
Some maintain that since libertarianism shares beliefs of both the Republican and Democratic parties, which are themselves typically associated with red and blue respectively, it should be associated with purple.
Arguments against
Others maintain that since the phrase "purple state" has already entered the popular culture as meaning any state that is on the fence between selecting a Democratic or Republican candidate, to adopt such a colour would confuse the issue.
It has also been pointed out that purple is often associated with royalism and monarchy, which is itself associated with autocratic big government--the very opposite of what libertarians advocate.
Blue
Arguments for
Blue represents the color of the sky, the limitless opportunity of each individual citizen where through freedom of information there is no man-made ceiling blinding the individual from his/her true limitless potential, the ceiling being an artificial construct that may also be encasing a citizen into a versus/group-think mentality wherein fear of excommunication overrides fear of potential tyranny in the form of security within a provided structure.
Arguments against
Blue is already associated primarily with the Democratic Party.
Yellow
Arguments for
Yellow is already associated with classical liberalism and libertarianism. So say the advocates, why not adopt yellow?
Yellow is often associated with gold, which is associated with prosperity and wealth, the products of a free market economy. Also, most libertarians support having a monetary system backed by metals, such as gold. (See: gold standard.)
Arguments against
Yellow can be associated with fear. Gold can be associated with greed.
Media
In 2004, CNN associated the Libertarian Party with yellow.[1]
A mock election held by USA Election Atlas also associated the Libertarian Party with yellow.[2]