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'Colour Sergeant' ('CSgt' or formerly 'C/Sgt') is a
non-commissioned rank in the
Royal Marines and
infantry regiments of the
British Army, ranking above
Sergeant and below
Warrant Officer Class 2.

Rank Insignia for Colour Sergeant
It has a
NATO ranking code of OR-7 and is equivalent to
Staff Sergeant in other corps of the British Army,
Flight Sergeant or
Chief Technician in the
Royal Air Force, and
Chief Petty Officer in the
Royal Navy. The
insignia is the monarch's crown above three downward pointing chevrons.
The rank was introduced into the British Army during the
Napoleonic Wars to reward long-serving sergeants. By
World War I it had given way to
Company Sergeant Major and
Company Quartermaster Sergeant, but it was later reintroduced.
Historically, Colour Sergeants of British line regiments were tasked with protecting
Ensigns, the most junior officers who were responsible for carrying their
battalions'
Colours (flag or insignia) to rally troops in battles. For this reason the Colour Sergeant rank was considered a prestigious one given normally to courageous Sergeants who had attained accomplishments in battles. This tradition continues today as Colour Sergeants form part of a Colour Party in military parades.
Colour Sergeants are referred to and addressed as "Colour Sergeant" or "Colour" ("Colour Sergeant Bloggs" or "Colour Bloggs", for instance), never as "Sergeant". Unusually, NCOs with the rank of Colour Sergeant who hold the appointment of Company Quartermaster Sergeant are still addressed and referred to by their rank, not their appointment.
Canadian usage
Colour Sergeant is also a rank in the
foot guards regiments of the
Canadian Forces, specifically the
Governor General's Foot Guards and the
Canadian Grenadier Guards. It is the equivalent to
Warrant Officer; a Colour Sergeant wears the rank insignia of a Warrant Officer (a royal crown) on all uniforms except No. 1 Ceremonial Dress, on which a special rank badge is worn: three chevrons, point down, surmounted by an image of regimental colours.
They are addressed as their British counterparts are.
See also
★
Comparative military ranks