Since you are a tech I'll keep it short. https://www.google.com/search?q=NP300E7A-S05SE&ie=utf-8&oe=utf-8#q=NP300E7A-S05SE+ccfl sees to show this laptop has CCFL backlighting so that could be damaged too.
Color can shift as CCFL age or take a hit. Example from other than your laptop:
Since just one tube or portion of a tube can be damaged that's my next suspect. Frankly I would either have it repaired by Samsung or accept it was damaged.
Recently I accidentally broke my laptop screen (dropped it on the floor and it cracked), and so I ordered a new one to replace it with.
The new one works, but there is a slight yellow-ish/white-ish tint. It really isn't a lot, and it doesn't bother me THAT much, but it IS different from before, and I'd like to get the usual colors back.
Any ideas on what I can do?
note: The new screen is the same exact model as the last one.