This can be caused by several things. 1) Your color correction can be off. This can be adjusted with your remote control. 2) Your television may not be working correctly. Consult a repairsman or buy a new set. 3) Your antenna cable is lose in the port or in the connector.
It sounds like you just need to adjust the colors on your television. It actually sounds like your tint is messed up. Try going to your menu on your television and adjusting it.
Your color settings are probably off. These can usually be adjusted in the Menu. Look for an option that says "Color" and follow the on screen directions to adjust. Check your tv instruction guide for full information on finding and adjusting this setting.
There are certain projection colors that are in the tv, RGB (red, green, blue) which make up the color spectrum of all colors. If the colors that are blue are green then the blue projector isn't working and needs to be fixed.