quipus
legend
The legend identifies the colors that represent the bars.
Color Depth
legend
legend
It is called the "key".
A legend or key.
Color Scheme
It identifies the elements by the colors that they give off.
blue -> green -> yellow -> brown (orange) -> red
This reference element is called a key.
Yes, Smead folders come in various colors. The colors are red, blue, green, yellow, orange. http://www.buyonlinenow.com/viewProduct.asp?SKU=SMD75425