A tape cassette that includes a housing, at least one tape, and a color indicator portion disposed between the tape housing area and the periphery, and in a specified area adjacent to the tape housing area on a rear edge side of the bottom wall, the color indicator portion indicating color information relating to the at least one tape and including a plurality of lateral information sections that are a plurality of strip-shaped sections extending along the left-and-right direction of the housing and aligned in a front-rear direction of the housing, wherein, of the plurality of lateral information sections, whether a protrusion is formed in a first lateral information section indicates a base material color of the at least one tape, and whether a protrusion is formed in a second lateral information section indicates a print color of the at least one tape.