Teal is a dark cyan color. Its name comes from that of a bird, the Eurasian teal (Anas crecca) which has a similarly colored stripe on its head. The word is often used colloquially to refer to shades of cyan in general.
It can be created by mixing cyan into a green base, or deepened as needed with black or gray. It is also one of the first group of 16 HTML/CSS web colors. In the RGB model used to create colors on computer screens and televisions, teal is created by reducing the brightness of cyan to about one half.