Chameleon Housing

[DanBayley]

Hey, I just came across this idea that sounds really cool in theory, but I'm wondering if you experts out there would know if it's actually technically possible.

Chameleon House: http://marblar.com/challenge/earthhack-sustainable-homes/idea/978

Homes are built with colour changing tiles respective to heat. They are black when it's cold and white when it's hot. This saves money on heating and air conditioning.

 

 

It seems a bit extreme, but what do you guys think? Do you know of any materials that would work as colour-changing tiles?