Scarlet (color) in the context of "Cinnabar"

Red is the color at the long wavelength end of the visible spectrum of light, next to orange and opposite violet. It has a dominant wavelength of approximately 625–750 nanometers. It is a primary color in the RGB color model and a secondary color (made from magenta and yellow) in the CMYK color model, and is the complementary color of cyan. Reds range from the brilliant yellow-tinged scarlet and vermillion to bluish-red crimson, and vary in shade from the pale red pink to the dark red burgundy.

Red pigment made from ochre was one of the first colors used in prehistoric art. The Ancient Egyptians and Mayans colored their faces red in ceremonies; Roman generals had their bodies colored red to celebrate victories. It was also an important color in China, where it was used to color early pottery and later the gates and walls of palaces. In the Renaissance, the brilliant red costumes for the nobility and wealthy were dyed with kermes and cochineal. The 19th century brought the introduction of the first synthetic red dyes, which replaced the traditional dyes. Red became a symbolic color of communism and socialism; Soviet Russia adopted a red flag following the Bolshevik Revolution in 1917. The Soviet red banner would subsequently be used throughout the entire history of the Soviet Union. China adopted its own red flag following the Chinese Communist Revolution. A red flag was also adopted by North Vietnam in 1954, and by all of Vietnam in 1975.

The Royal Military Police (RMP) is the corps of the British Army responsible for the policing of army service personnel, and for providing a military police presence both in the UK and while service personnel are deployed overseas on operations and exercises. Members of the RMP are often known as 'Redcaps' because of the scarlet covers on their peaked caps and scarlet coloured berets.

The RMP's origins can be traced back to the 13th century but it was not until 1877 that a regular corps of military police was formed with the creation of the Military Mounted Police, which was followed by the Military Foot Police in 1885. Although technically two independent corps, they effectively functioned as a single organisation. In 1926, they were fully amalgamated to form the Corps of Military Police (CMP). In recognition of their service in the Second World War, they became the Corps of Royal Military Police on 28 November 1946. In 1992, the RMP amalgamated into the Adjutant General's Corps (AGC), where they form part of the AGC's Provost Branch.

The King's Regiment (Liverpool) was one of the oldest line infantry regiments of the British Army, having been formed in 1685 when a single battalion was raised as The Princess Anne of Denmark's Regiment of Foot.

The original uniform consisted of a long scarlet coat turned up with yellow. Yellow breeches and waistcoat, white cravat, broad brimmed hat turned up and adorned with yellow ribbon, white stockings and 'serviceable' shoes.