A/S Kristiania Elektriske Sporvei or KES, nicknamed the Blue Tramway (Norwegian: Blåtrikken), was a company which operated part of the Oslo Tramway between 1894 and 1924. It built a network of four lines in Western Oslo, the Briskeby Line and the Frogner Line which ran to Majorstuen, and two other consecutive lines, the Skøyen Line and the Lilleaker Line. These all connected to a common line through the city center which terminated at Jernbanetorget.