VICTORIA police will reveal their new, dark blue shirts, as the force undertakes its first uniform overhaul in 30 years.

The new general duties uniform feature navy blue shirts similar to those of Los Angeles and New York police, and allows officers to wear tactical (cargo) pants, rather than office trousers.

Police will also be given summer and winter undergarments to wear under equipment vests.

Chief Commissioner Ken Lay said the uniforms were a result of 18 months of trials.

"The end result that we see today is a functional, fit for purpose, comfortable and cost-effective uniform for members to wear in their day to day duties," he said.

"Its about presenting ourselves as a modern, professional and easily recognisable organisation."

The new uniforms, to be made by four clothing manufacturers, will be rolled out across the state between May 2013 and May 2014.