Potter was Dark. He'd been moving down the spectrum for a few years now, so it wasn't all that surprising, despite being a surprise. Granger was, at the least, Dark-Grey. Again, not surprising; the two were as close to being siblings as one could get without being blood-related. No, what was surprising was that the two Lions had spent minimal time with the two Weasleys still in Hogwarts. Severus had also seen Potter with a textbook numerous times in the library or Great Hall. If Potter wasn't reading, he was going over notes with Granger. In the past five school years, the Potions Master had never seen Potter with a textbook, voluntarily studying.