My son uses the Pantone Huey for this. However you want "best" so look at the best Pantone calibrator you can find.
the monitor is precalibrated from the factory but I don't know what they used to calibrate it or if it's possible to be made better. What is the best colorgrading method for a pc running windows 10home with a GeForce gtx 780 and a 1440 resolution precalibrated monitor?

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