Adjust your white balance. As your camera isnít able to distinguish the difference between white and another colour such as grey or light yellow, sometimes we need to tell it manually. You can then correct the colours in your photo to ensure they look true to life.
Situations such as being under an artificial light can give your photos a yellow or blue tinge.
You can play around with the white balance options on your camera to produce the best possible outcome. Examples of white balance settings are: auto, shade, tungsten light and fluorescent light.
Read more about white balance and colour correction here.