I have Orange/red/yellow picture colors

So I have an LG Plasma tv .. give or take had it for about 10 years (yea quite some time haha) over some time I've noticed that certain colors started to fade. Thought it was one of my kids messing with it so I tried to adjust the color "back" with my remote. Anyways one morning I turned on the TV and my picture ONLY has the colors orange yellow and like a reddish.. no matter what I did it hasn't gone back to normal just stayed the same.. what could it be ? Bulb?