I have come across a couple of bands that have to be inevitably mentioned on a band's description (mostly to avoid confusion). Now, when they are linked to whichever source the contributor deems appropriate, the hue of the name appears like that of a listed band, thus they seem as part of the database (at least to someone who might visit the site a couple of times). Could there be a way to make a differentiation on this, which maybe could extend to an artist's non metal bands (although their current state is still okay).

Can you provide an example? I'm not really following here.

He's suggesting that external links should have a different shade of grey than internal links.
http://www.metal-archives.com/bands/Misled/3540409457

^ Touché. If not necessarily grey, but anything to make them much easier to distinguish (as an external link).