Is background-color:none valid CSS?

Question

Can anyone tell me if the following CSS is valid?

.class {
    background-color:none;
}

Answer 1

The answer is no.

Incorrect

.class {
    background-color: none; /* do not do this */
}

Correct

.class {
    background-color: transparent;
}

background-color: transparent accomplishes the same thing what you wanted to do with background-color: none.