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Custom RGB calibration

Up til now you've only used the "Native" setting in this menu:


But to utilise your screen's "Custom" or "User" RGB settings, you must choose your custom target.

Explanation of numbers

It gets a bit confusing here.  The "D" numbers in this menu equate to the temperature scale you've already written down on your piece of paper.

  • D50 = 5000K
  • D55 = 5500K
  • D65 = 6500K
  • D75 = 7500K

These numbers are used interchangeably in the industry.  If one lab recommends you calibrate to D65, another one tells you to calibrate to 6500K.  In essence, they mean the same thing.  (Nerds will chew your ear about the technical differences, but for our purposes, they're the same.)

The important thing to remember is this:  The higher the number, the colder/bluer the temperature.  D50 is the warmest, D75 is the coolest.

Which target to choose?

Look at your piece of paper.  Here's my example again:


Both of these settings gave me results very close to 5500K, or D55.

  • If I needed my screen to be warmer (unlikely) I'd need to choose the "CIE D50" target from the menu.
  • If I needed my screen to be cooler (more likely) I'd choose the next coolest setting, "CIE D65".
  • If I needed my screen to be a lot cooler (unlikely) I'd choose "CIE D75".

You need to make the same assessment.  Look at your piece of paper, and see where your previous calibration slots into the list, then make your decision about which new target to choose.  Post in the comments section below if you need my help with this.

In my example I'll choose D65.  This is definitely the most common setting.


Then press Next.


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