XL2720Z color problems

[OsyLV]

Yellow color on my XL2720Z monitor seems like washed out at the bottom of screen. I did adjustments in monitor menu and nvidia control panel, but i can’t get it right. It looks like this (not so greenish, though, it’s my bad camera..), tested with CheckeMON.exe. Image was taken from about 80 cm from the screen.
http://i.imgur.com/b0BCDHs.jpg
I know that TN panels shift colors, but I don’t expect that to occur, when I sit quite opposite to the monitor.
Does all 27" TN panels act this way? Should i RMA it for replacement?

[OsyLV]

I think i got it to work correctly. I used Benq Display Pilot and chose Standard profile from “Picture Mode”. Profiles from “Game Mode” all have washed out yellow color.