Unfortunately, too few settings and color cast

Had bought the screen when the flash deals and he should my old Acer replace 22 "LCD. The processing leaves nothing to be desired and the base is really great. Unfortunately, my copy always had a slight color cast to the Red or Blue. Tried about the color settings a neutral white set, but it did not succeed. There are generally at the screen very few settings. Probably one AH-IPS panel is installed, because in direct comparison with an AOC i2369VM I could not tell the difference at all tested games. For me it is ultimately become the AOC since this provides a significantly better color rendering and the grayscale dissolves much better.