Tape cassette

A tape cassette, comprising:

• a housing including a top wall having a top surface, a bottom wall having a bottom surface, and a side wall, the top wall and the bottom wall having a generally rectangular shape whose longitudinal direction is a left-and-right direction of the housing, the top wall, the bottom wall, and the side wall defining a periphery of the housing;
• at least one tape mounted in a tape housing area defined within the periphery;
• 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, the plurality of lateral information sections being 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:
• a presence or an absence of a first protrusion that extends downward from the bottom surface and is formed in a first lateral information section indicates, as the color information, a base material color of the at least one tape, the first lateral information section being one of the plurality of lateral information sections and adjoining the rear edge of the bottom wall.