Which uniform is referred to as number 3?

The uniform referred to as Number 3 is the DPM or MTP greens, which stands for Disruptive Pattern Material or Multi-Terrain Pattern. This designation is primarily used for the combat uniform worn by the military, particularly in operational settings. The Number 3 uniform is indicative of combat or field environments where the camouflage pattern is necessary for effectiveness in various terrains, hence the use of the word "greens."

In military terminology, uniforms are often categorized by numbers to easily distinguish their purpose and style. The DPM or MTP greens are specifically designed for outdoor activities and engagement in operational scenarios, promoting concealment and protection. The other uniform options—Wedgewood blues, working blues, and long service dress—represent different styles suited for various non-combat situations, such as formal events, daily work duties, or ceremonial occasions, and are not associated with the Number 3 classification.