That's what I thought ,so I edited my previous post.

It's to do with what colour temperature your screen is outputting.

Have a look at your monitors menu,it might have different colour temperatures.
They might be labeled ,easy,expert,rgb etc or cool,warm normal etc or even 5600k,6500k,7500k.

You would want either Expert,Normal or 6500k settings before you started calibrating your screen as these effect the overall colour cast,either low as in a blue cast or red in a higher one.

All SONY set are a bit high [they push the red end of the colour spectrum even when set to normal,it's only with proper calibration that you can get everthing correct [which usually means getting into the service menu to adjust individual RED,GREEN,BLUE colour bias]