Colour state other than clouds or low visibility (e.g. ice or other obstructions) then the word BLACK is written in full and placed immediately before the actual colour state (e.g. BLACKWHT). The colour state may be appended to a METAR report. A short period forecast called a "TREND" which covers the following two hours from the observation may also be added, often with reference to the colour state. The following criteria are used to determine the colour state: Colour state Colour states is a system used for quickly showing meteorological conditions. Meteorological colour states are determined by the relevant worst condition from
British Colour Council British Colour Council The British Colour Council (BCC) was an industry standards organisation, active from the 1930s to the 1950s, which produced indexes of named colours for use by government, industry, academia, and horticulture. Founded in 1931 and chaired by designer Robert Francis Wilson, the BCC produced the British Colour Council reference Code or British Colour Codes: indexes of named colours for a variety of industries. Its first major work was the British Colour Council 1934 "Dictionary of Colour Standards" which defined colour shades in its printed plates and gave a two or three number code and evocative names to