Sherwin-Williams, Benjamin Moore and Custom Pins feature teal green color charts on their websites. Find a teal green color chart at most paint stores or on most paint stores' websites, as well as at most companies that offer products in a large variety of different color shades.
Benjamin Moore offers a tool through BenjaminMoore.com called "Color Gallery" that allows users to choose a color palette and view different shades in that color. Sherwin-Williams offers a similar tool on Sherwin-Williams.com, as does Custom Pins. Most paint stores also offer color booklets that may contain a teal green color chart.