The appearance of gallbladder cancer on color ultrasound depends on the morphology of the cancer, which is mainly divided into five types: small nodular, thick-wall, fragmented, calculous, and mixed type. The small nodular type mainly features a polypoid elevation with a wide base, about 1-1.2 cm in size, and has isoechoic characteristics. The fragmented type is characterized by a wider base and irregular borders, presenting as hypoechoic or isoechoic masses. The calculous type shows an enlarged gallbladder, possibly containing hypoechoic and uneven solid masses that may fill the entire gallbladder. The thick-wall type primarily involves localized or diffuse thickening of the wall. The mixed type is a combination of papillary fragmented type and thick-wall type presence.