I just bought a MacBook Air and I am trying to connect it to a monitor using HDMI with the Thunderbolt cable. When I do this it seems to work, but the picture quality is really bad. Everything has a grey feel to it and makes it really hard to read and work on. This monitor works fine when connected to via HDMI from another laptop. I have tried connecting it via HDMI using both Windows and OSX.

Does anyone know how to fix this? Thank you.