I've had a look through your TV's manual and it states it can support 60hz signals. If the image is stable and it's just the colours that are off, you may wish to run a problem game and try the following:
Support > Self Diagnosis > Picture Test
https://www.manualslib.com/manual/10668 ... l?page=122
Picture > Advanced Settings > Colour Space > Auto
https://www.manualslib.com/manual/10668 ... ml?page=88