Normally your camera is set for taking photos in daylight, but when you move indoors then the camera still assumes daylight even though the light may be colder (blur) or warmer (orange). In this case you have to adjust the White Balance to the required light source using the menu function on your camera. You can also set the camera to compensate for daylight in the same way to adjust for sunny or cloudy conditions.
Just refer to the camera instructions for setting White Balance.