|pic via Refinery 29|
My favorite teal is a recent acquisition; Athens (Sinful Colors) is a yummy teal creme that lies dustier on the nails than in this pic (this is with flash). It's a perfect fall color, especially for when the sky is acting up all cloudy.
A second choice is the brighter and greener Mint Sprint (Sally Hansen). However this is much greener but like Athens it is dusty looking and not so bright in natural light which makes it a great fall polish, in my opinion.