Colour Perception

I'm aware that I'm probably on my own on this one, but I find colour perception fascinating. For example, I found this photograph below, which has been overlaid with a cyan filter. The lady's tshirt in the original photo is yellow, and this is how it appears in the adjusted photo.


However, a bit of magic wand action shows us that the colour we are actually looking at in this photo is this shade of green:

The reason for this is that our eyes adjust to the cyan filter, and we naturally correct it. I think this concept is really interesting, and it makes me wonder how it could be used in design...