A GV star, or yellow dwarf, is a main-sequence star. It is of spectral type G and luminosity class V on the Hertzsprung-Russell Diagram. The term "yellow dwarf" is a misnomer, because G-type stars actually range in color from white, for more luminous types like the Sun, to only very slightly yellow for the less massive and luminous G-type main-sequence stars. See spectral classification for a chart of star color by light type. 