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
Metacresol purple CO dissolves as CO is acidic. In chemistry, it has two useful indicator ranges: Metacresol purple Metacresol purple or m"-cresol purple, also called m"-cresolsulfonphthalein is a triarylmethane dye and a pH indicator that is used in medicine to detect end-tidal carbon dioxide to ensure successful tracheal intubation in an emergency as the indicator inside a colorimetric carbon dioxide detector. It can be used to measure the pH in subzero temperatures of saline or hypersaline media. In colometric capnography the indicator is incorporated in a matrix that provides a pH just above the indicator's colour change, it undergoes the colour change