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 green" is a dark green color created by mixing Prussian blue and Gamboge. It is displayed on the right. Hooker's green takes its name from botanical artist William Hooker (1779–1832) who first created a special pigment for leaves. Displayed at right is the color "jungle green". In 1990, Crayola named and formulated this specific tone of jungle green. The first recorded use of "jungle green" as a name of a color in the English language was in 1926. "Laurel green" is a medium light hue of greenish gray similar to asparagus, but lighter. The first recorded use of "laurel green"