Our eyes are adaptive to white to sacrificing 100% white is common enough since very little of what we watch is 100% white anyway. We think blue socks are white too after all. The graph looks decent enough for what the tv brings to the table. You made it better. You are not trying to hit 2.2 gamma anyway … just somewhere in the 2.2 to 2.6 range and you have done that.
most important is to have the midrange 40-70-80 as good as you can … then get decent blacks that are not green or red …
regards
