There are a lot of technical terms that get used in TV marketing these days, but none is more mysterious than colour ...

The color of light, expressed in Kelvins (K). The sun is about 5800 Kelvins. This is called a "temperature," because the hotter fire gets, the more it changes from a warm yellow glow to white.

Color-changing phones aren't anything new, but how about a phone that changes color based on your environmental temperature?