It really is funny to me to hear everyone arguing over what color hat they see on their television. Your television is NOT capable of displaying accurate color unless you have had it professionally calibrated or your set has a color temperature adjustment and you have it set to the lowest setting or the warmest setting and by the off chance that this setting is actually close to the NTSC standard. Here is the reason why.
The NTSC picture we view on our televisions have a standard which can not be deviated from, for accurate color. The tv manufacturers adjust your brand new set improperly at the factory on purpose. Why? Simple. If they adjust it improperly, they will sell more sets.
For accurate color, the color temperature must be set to 6500 degrees kelvin. Anything other than this and it results in inaccurate color. The tv manufacturers know this, but they still set the color temperature too high on purpose.
The higher the color temperature, the brighter a picture will look. It is just a fact about the way that a human eye works, that if you look at 50 tvs lined up in a store, the one that looks brightest is the one that you will swear looks the best. If they are close to the same price, the brightest one is the one that you will buy. So, the manufacturers continue to set the color temperature too high to attrack your eye and they can sell more tvs.
Having the color temperature too high is also bad for the set as it overdrives the picture tube and will decrease the life of the set. The manufacturers don't care about this either, because it just means that your tv will wear out sooner and then you will buy another one. It is planned obsolescence.
Some tvs have the color temperature set so high, that in winter scenes, the snow actually has a blue tint to it. Most of the snow that I have seen is white, not blue.
So, unless you have had a professional calibration done on your set, it really doesn't matter if you see a gray hat or a brown hat. You aren't looking at accurate color anyway.
If you would like to have your set professionally calibrated, contact Joe Kane's Imaging Science Foundation for all the information that you need.
http://www.imagingscience.com/