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 Celtics of the National Basketball Association use this shade for their uniforms, logos and other memorabilia. "Tea green" is a light shade of green. It is a representation of the color of brewed green tea, i.e., the color of the hot green tea after the green tea leaves have been brewed in boiling water. The first recorded use of "tea green" as a color name in English was in 1858. "Teal" is displayed at right. It is a dark cyan color that is a representation of the color of the neck coloring of a duck called the common teal. Olive