Peacock was a catalog color for 2 years, 1965 and 1966. It is correspondingly rare. Peacock is similar to Teal (1950’s) and Seabreeze. See the comparison photo below.
This photograph shows Seabreeeze on the left, Peacock in the middle and Teal on the right. This Teal is the older variety from the 1950 time period. Peacock seems to have a little more green than the others. Also notice the different shape neck and spouts on the older Peacock water bottle.