I know this is a really old thread but the tint you see in light is known as Colour temerature.... Normal daylight is 5500 degrees kelvin on a sunny day. On a cloudy day the colour temerature is cooler and you get a blue tint, warmer and you get yellow.. You can get globes for your house that are cooler or warmer colours and shops use this to their advantage, mostly furniture shops to make the furniture "glow" and appear a better colour... If you own a digital camera turn auto white balance off and manually set it to outdoors (if you are outside) then set it to indoors and watch the colour change
... just remember to change it back to auto after though
..
HERE is a link to a photo website that should explain it more... (please know I did not read the article but know through photography experiance)