Red and yellow lights shone from the top of the Empire State Building at dusk Wednesday, a tribute to communist China's 60th anniversary that protesters labeled "blatant approval" of totalitarianism and criticized as inappropriate for an icon in the land of the free.

The building is routinely lit with different colors to mark holidays and big events, but opponents questioned whether it's right to commemorate a sensitive political issue, particularly when China has such a poor human rights record.

About 20 supporters of Tibet, which China has ruled since shortly after communists took over in 1949, protested outside the building during a ceremonial lighting of a scale model inside the lobby. They chanted "No to China's empire; free Tibet now," and held signs reading, "Empire State Building celebrating 60 years of China's oppression."