Yeah, no wild colour schemes on this one, apart from the names! There were only four colours: Ebony (black), Cinnamon (red), Concord (blue) and Spearmint (green).
It's one of the very few Gibson guitars with a non-nitro finish, hence the "SL" ("sans lacquer"

). It's some kind of UV-cured poly which was meant to dry very quickly and therefore save on production costs. They can't have been very convinced though, because they never used the finish again as far as I know.
The guitar's constructed very much like the LP SmartWood Exotics and the LP Custom Lite (both of which I've owned before), with a thin body and a slight belly cutaway on the back, but it's all mahogany so it's as much an SG as a Les Paul really.