My Samsung did the same thing. I was going out to buy a new tv because I was told it was going . I tried going on the internet and checked what to do . I tried several of the suggestions on it. Suddenly I just started playing with the settings going through each one under picture. Now it’s back to normal. I suggest you try a factory reset and then going through each of the settings until it comes clear again. Mine had blue faces at one point with the entire screen blue. Now the peoples faces are normal again . I think the tv adjusts itself and you have to go back and fix it yourself