Default Screen contrast, color balance and Dark themes

I'm a Xperia z1 newbie, migrated from Galaxy Note (Gorgeous AMOLEDs). Very often I feel screen is lacking contrast and the stock themes tend to have very greyish tones than blacks. Is there a theme which has blacks instead of greys (in status bar, navigation buttons) ?

Also is there an app that can fix color balance. The screen looks to have a pinkish tone when i keep it against Nexus 5 or Galaxy Note.
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Nexus 10 with Android 4.4.2 | Xperia Z1 on 4.4.2