Yellow

Yellow is one of the 3 basic colors. It has had various associations and significances in various cultures over the years. Among the Indians of the Western Hemisphere, it has represented North to the Hopis and South to the Mayans. It represented air in ancient Greek culture. It has had a negative image in some cultures, being associated with cowardice, deceit, and criminality. On the other hand it was the royal color of the first Emperor of China. It has also been associated with the sun. Because of its brightness, it has been used where being noticed is important, for example in clothing worn by traffic guards and highway workers where it is important to be seen so as not to be hit by traffic and on school buses for the same reason. The races of man have been assigned colors in one system of categorizing, yellow being assigned to the races of East Asia. So the color yellow has represented various ideas (often opposing ideas) to various cultures throughout history. It is a beautiful color, especially when displayed and coordinated in an artistic manner.
The making of yellow glass by adding minerals dates back to ancient times beginning in Egypt and Mesopotamia. It was adopted by other Middle Eastern civilizations, then the Greeks, then the Romans, and later the Venetians during the Middle Ages and Renaissance. In modern times, yellow glass has various functions including but not limited to lenses of safety goggles as well as lampwork beads for jewelry.