S030, S031 & S032 are the RGB drive controls that adjust the grey scale.
Since I don't have the set, I can't tell you any settings. Even if I did, every set is different. I would adjust the blue first since the set leans towards blue even on the low setting. Just be sure you write down ALL the orginal settings first.
Abundant OTA television is what makes this country different from all others. Lets keep it this way. If you like Wi-Fi so much, OTA fits right in. After all, it is wireless.