I purchased a Sony projection

Disconnect all the cables from the TV including the power cord then reconnect them after a few minutes. Make sure that the power cord from the TV is directly connected to a functional wall outlet.
Also try connecting different video sources to the TV such as DVD player, playstation, etc. to check if the Blue color is visible regardless of the video source connected to the TV.
Furthermore, reset the TV to the original factory settings. Refer to the user manual for the TV to get to know the exact steps to reset the TV to the factory default settings.
if the issue persists even after performing all the above steps then the problem is with the optical block (light engine) of the TV. You may visit the Sony model specific web site to check if Sony is offering any special service program for the TV model for optical block issues.

I need your Sony TV model number to diagnose problem and its possible solution.
Thanks.