Two more new-to-LT features in 2009 are True Color.and Color Books.
It used to be that there were only 255 colors available in LT -- 1 meant red, 2 meant yellow, and so on. For most of us, that's enough. (More than enough, usually.)
But for some people, having the actual "real" color of an object is important -- interior designers come to mind first, but there're plenty more. So in LT 2009, you have two new ways to choose an object's color.
Using True Colors enables you to specify a color by its Hue, Saturation, and Luminescence (HSL) values, or by its Red, Green, and Blue (RGB) components.
You can also select colors from pre-loaded Color Books, including several Pantone and RAL libraries. Some other manufacturers, like Sherwin-Williams, are beginning to provide their own color books as well, that you can download and import yourself.