Trivial name for example, hydrogen ("water-producing"), oxygen ("acid-producing"), nitrogen ("soda-producing"), bromine ("stink"), and argon ("no reaction") were based on Greek roots, while the names of iodine and chlorine were derived from the Greek words for their characteristic colors. Indium, rubidium, and thallium were similarly named for the colors of particular lines in their emission spectra. Iridium, which forms compounds of many different colors, takes its name from "iris", the Latin for "rainbow". The noble gases have all been named for their origin or properties. Helium comes from the Greek "helios", meaning "sun" because it was first detected as a line in the
Shades of green a shade of greyish green in the classic range of colours of the German RAL colour standard, where it is colour 6011. The name derives from the colour of the leaves of "Reseda odorata", commonly known as mignonette. "Sap green" is a green pigment that was traditionally made of ripe buckthorn berries. However, modern colors marketed under this name are usually a blend of other pigments, commonly with a basis of Phthalocyanine Green G. Sap green paint was frequently used on Bob Ross' TV show, "The Joy of Painting". "Shamrock green" is a tone of green that represents the color