Default Colour calibration

Every AOSP ROM I run has this option in the settings and I've always thought about making it more colourful and such but I've tried and I wouldn't know the correct colour percentages. Anyone using a good configuration and would like to share?

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MY DEVICES
  • LG Optimus G - CM11 4.4.4 - Solid Kernel (For now, always switching ROM).
  • iPad Mini (Non Retina) - 16GB - White - iOS 8 Beta 5.