Filming issues

So far I have not had any issues with the actual filming of my animation until today. I had previously shot all of the sequences in the mornings at near enough the same time, and set up the rig to do the same today. However the camera seemed to be recording the image with a pinkish tint. This had not happened before and I was unsure as to what seemed to be the problem. I checked all of the camera settings and lighting and all seemed to be fine. I decided that there was not much point in filming the animation with the pink tint as it would not be of the same quality as the rest.