background-color not validating when it should

We have elements in our CSS that should validate as per the CSS2
specifications.

 

We used the following code that resulted in the validation warning.

 

a {

            color: #06f;

            background-color: transparent;

}

 

The warning raised was as follows.

 

Line : 131 (Level : 1) You have no background-color with your color : a

 

We have tried using many variants to alleviate this warning but nothing gets
by it. The "background-color: transparent" specification should be valid
according to http://www.w3.org/TR/REC-CSS2/colors.html#background-properties

 

Correcting this apparently bogus warning or providing an explanation as to
why it does not validate would be appreciated.

 

Thanks,

Robert Mullaney

Easy Business Services <http://www.easybusinessservices.com/> 

Phone: 239-242-6691 x 22