Colour sergeant (CSgt or C/Sgt) is a rank of non-commissioned officer found in several armies and marine corps.

[1] In the Australian Army, the rank of colour sergeant has only existed in the Corps of Staff Cadets at the Royal Military College, Duntroon.

1 Ceremonial Dress, on which a special rank badge is worn: three chevrons, point down, surmounted by an image of regimental colours.

In Foot Guards regiments, colour sergeants are addressed as "Sir" and afforded the respect and privileges normally accorded to warrant officers.

[8] Colour sergeants and warrant officers form an important part of the instructor cadre at the Royal Military Academy Sandhurst.

[9] Color sergeant is an NCO rank that was used historically in the United States Army, most recently during World War I.