The OPO does not use a Super AMOLED device so colors seem different, blacks are more grays. You can adjust it accordingly by using the custom presetting
Adjust the settings around till you get it the way you want it.
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| Scrolling Mods for Various OPO Roms
: Mahdi | Franco Kernel
Older devices: Nexus 5, Nexus 4, Galaxy Nexus, TF101, Nexus S, Samsung Vibrant, G1