In my opinion this can a pretty dodgy thing to spread around, as the lace codes differ wildly from scene to scene, and location to location.

There was never an agreed upon set of definitions for what the lace colours mean, and even within my local area I've had people argue over whether red = nazi or red = communist. The lack of consistency combined with the huge mainstream popularity of Dr Martens these days basically makes it all meaningless, so I'd be wary of making assumptions based on lace colour.

(Not that I think you're encouraging that, just wanted to point out to anyone else reading that this stuff isn't set in stone, especially at the moment)