Political colour most commonly associated with liberalism. It is the official colour of the Alliance of Liberals and Democrats for Europe (ALDE), as well as being the colour of liberal parties in Germany, Romania, Estonia and the United Kingdom (the Liberal Democrats). Yellow or gold, usually together with blue or purple, is also often used to represent right-libertarianism and classical liberalism. Notable national political colour schemes include: Political colour Political colours are colours used to represent a political party, either officially or unofficially. Parties in different countries with similar ideologies sometimes use similar colours. For example, the colour red symbolises left-wing ideologies
George Palmer (colour theorist) is moved by its own ray." This statement has proved true in regard to the number of different light sensor types, the cones, in the human eye, if not in regard to the claim of three kinds of light. Twenty-five years later a similar statement was made by the eminent physicist Thomas Young. Voigt, in his report on Giros von Gentilly, describes him as having stated that colour blindness arises if one or two of the three kinds of "particles" (light sensors) in the retina are inactive, a statement found to be accurate. In 1786 Palmer provided a hypothesis for