Small White Balance Shift

The human eye/brain is pretty amazing at fooling you and telling you lights are the same color when they're actually not. The camera goes through a process to try and figure out what the actual color of white is (or should be) and attempts to make white look like white (or grey look like grey). Outside it's actually blue-ish, your house is more orange, and many fluorescents are actually green. 90% of the time I control my white balance manually allowing more control over what colors are subdued or pop. Try going outside while setting your white balance on tungsten and see what happens, I spoke about this once before.