I have 18 month old model UA58NU7105K TV and just noticed dark blueish screen when selecting Standard or Movie Picture mode. The other two picture modes "Natural and Dynamic" looks just fine.
What could be the problem
I apologize for the inconvenience. However, we do not have the ability to support models outside of the US. There are differences between the US and International firmware, which we do not have access to. If you purchased your device outside of the US, please visit the link below for support in your area. http://www.samsung.com/visitcountry