Why does the validator NOT complain You have no background-color with your color?

The validator does not appear to be behaving as the FAQ would indicate
it should.  When I submit a style sheet that specifies only
background-colors but not colors, or vice versa, the validator does not
generate any warnings.  For instance, this simple sheet:

body { background-color: #000000; }

should generate the error mentioned in the FAQ, "You have no
background-color with your color", but it does not.

I recall getting this error in the past, and I think it is a useful
error to provide.  Could it be re-enabled?


Thanks,

Benjamin Strautin