Colorino Talking Color Identifier
The Colorino is a small, hand-held device that's unbelievably easy to use. In fact, it has only two buttons, and is less than five inches long, an inch and a half thick, and a little under two inches wide. Press the button closest to the speaker (while holding the wide end of the unit firmly against any object), and you'll hear the exact color spoken aloud in clear, concise human speech. The other button activates the built-in light probe, which emits an ever-changing acoustic signal, depending on your distance from the light source.
More information: http://www.braillebookstore.com/Colorino-Talking-Color-Identifier.1