lg g3 display color topic

Hey guys i got a new lg g3 from orange. I just remarked something in strange. At first the phone display look so nice in the shoop having a little darkies tone and the photos where in a way a little more darkies in compared with lets say a note 4 or even htc one m8. It was nice not in a bad way by any means. So i order one and got it i was very happy about the phone but i noticed that the darker accents are not there, well i didnt knew if the light from the store was the problem so i went to the store and compared the 2 phones and its was a difference in the contrast of the display.


My question is can i make my display darker in a way. Its not about the brightness becouse both phones where using 100% of it.
Or do you think that the phone from the store has some problem or even mine.