Awww, man! Dammit.
Well, Cephalopods are still the coolest thing on this planet.
The BBC article it linked to is also misleading, then? http://www.bbc.co.uk/nature/15654086 Granted, I have a terrible summer cold, so I could very well be misreading it.
The BBC article’s correct, they just go from clear to slightly less clear- they have red markings that expand and contract in reaction to certain types of light, allowing them to camouflage themselves in deep water. It’s twitter, so I had to simplify things a bit. :)
The photo with the coloured boxes is just meant to show off how they look at full transparency- the squid isn’t reacting to its surroundings, just light.