Chartreuse green was codified to refer to this brighter color when the X11 colors were formulated in 1987; by the early 1990s, they became known as the X11 web colors. The web color chartreuse is the color precisely halfway between green and yellow, so it is 50% green and 50% yellow. It is one of the tertiary colors of the HSV color wheel, also known as the RGB color wheel. Another name for this color is chartreuse green.See the 1930s version of "Chartreuse green" in the index and color samples, a color not as green as the web color chartreuse, but greener than chartreuse yellow – actually it is a representation of the actual color of green chartreuse liqueur. The first recorded use of chartreuse green as a color name in English was in 1926 – Maerz and Paul A Dictionary of Color Page 192; Color sample of Chartreuse Green: Page 47 Plate 12 Color Sample L2
