The police may soon become the boys in blue all year round by casting off their century-old summer green uniform in the biggest change of style the force has seen for more than 20 years. Management yesterday briefed representatives of officers' associations about the plan to introduce a short-sleeved blue or white shirt and dark-blue trousers. Officers below the rank of station sergeant would wear blue shirts and those above, white - similar to the winter uniform. The plan, if adopted, would see the disappearance of the green uniform, which in the late 19th century earned Chinese officers the nickname luk yee, or green coat. The last radical change was in 1979, when long trousers replaced summer shorts. The dark-blue jacket worn in winter would also be replaced, with a waterproof black coat and removable fleece. The chairman of the Junior Police Officers' Association, Lau Kam-wah, said: 'The change would bring us into line with the dark blue used by many forces.' The proposals will be the subject of a force-wide consultation and are expected to cost $120 million, including changes to caps, shoes, belts and baton holders. Officers would have their new uniforms by late 2003.