Once you have solved the simple puzzle to open the door you will see three puzzles. Here the aim is, once again, to separate the colors, but the colors you see when stood in front of the puzzle are not the true colors. You need to stand behind one of the colored pieces of glass to reveal the true colors. Essentially, the glass acts like a truth filter, for the puzzles. Be warned – the chain of puzzles goes back one if you fail a puzzle.
The first one can be solved by standing outside the room, behind the yellow window. The second is solved by standing behind the blue glass to the side of the puzzle. Finally, for the third you need to stand behind the yellow window, looking through the blue glass. It can be difficult to see clearly so if you need help see the solutions below.
Next, head up the stairs and you will see a pink fluorescent room with two puzzles on the wall and what looks like a switch off to the right.