2407WFP-HC or maybe 2407WFPb colour problems

Greetings,

Just yesterday I've got a brand new 2407WFP-HC. On first sight everything looked great. No bad pixels. No banding or bleeding. Great sharpness and acceptable response time. Ghost effect is slightly noticeable in most extreme cases, but this is not a problem for me since I work with CAD almost exclusively. All my others monitors have actually more visible ghost effect anyway.
On default settings it seems to me that colours are much too bright, and somehow greenish. Especially the white colour is unpleasant for my eyes because of its brightness. Saturation option would solve this problem in one click, but since I wasn't able too find such option in monitor menu or in driver software options, I have to reduce RGB manually. When I do this, (RGB=74-72-70, brigtness&contrast at 50,Desktop PC mode) colours look just fine but a very noticeable and annoying colour banding occurs, escpecially good visible on gradients of all colours. Mostly in horizontal direction.

Is there any way to adjust colours without loosing display quality as given in deafult mode?
There must be. Maybe some calibrating software? Or different drivers?
Or maybe color profiles?

I bought such an expensive (150% of average monthly salary in my country) monitor just to avoid such problems as colour banding, and now I have it.

Plus, I just found out that on the back of my monitor there is written that it is a 2407WFPb Rev A00!
On the bill/box/secret menu there is written: 2407WFP-HC.
Which one is it then?
Did I loose the panel lottery?

I would really appreciate an answer while I can return it...