What chemical elements get their name from the color of the main lines of the spectrum?

Six chemical elements are named due to the color of the main lines of the spectrum. Indium – so named because of its indigo color. Iodine is named by the chemist Gay-Lusak “odis”, which translated from Greek sounds like “like a violet”, that is, purple. When analyzing the spectrum, rubidium was determined by its characteristic red lines (in Latin – “rubidis”). Thallium is the green color of the spectrum. Cesium translates from Latin as “sky blue” – because when analyzing the spectrum, two clear blue stripes stand out. Chlorine (in other Greek “chloros” means “green”) – because of its light green color.