Complete all four steps in sequence for consistent, repeatable results.
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Step 01
Step 02
Cycle through each colour field and scan the panel surface with your eyes. Confirm all criteria below before proceeding.
Before Step 3
Step 3 requires two things: a colorimeter (a small probe you clip or place against the screen that physically reads the light and colour it emits) and calibration software that interprets those readings. Every option below runs on macOS — natively, or via Parallels where noted — and the first two are free, so you don't need an expensive Windows-only suite. Here's what we recommend.
Software — Calibration Suite · pick one
Calibrite Profiler 3
by Calibrite · free with the probe
The software bundled with Calibrite colorimeters, running natively on macOS and Windows. Handles monitor calibration, profiling, and validation, with utilities to check luminance, accuracy, and uniformity.
DisplayCAL (Python 3)
open-source · ArgyllCMS
A free, open-source suite with native Apple Silicon support. The most capable no-cost option for detailed gamut and greyscale analysis on a Mac.
ColourSpace CMS
by Light Illusion
Professional colour management used in broadcast and cinema. Windows-only — run on a Mac via Parallels Desktop. ColourSpace is the more affordable license; LightSpace is the higher tier.
Calman
by Portrait Displays
The industry-standard suite display manufacturers use. Windows-only — best if you already work in a Windows calibration environment.
On macOS: use the built-in ColorSync Utility and System Settings to confirm and manage the active display color profile, and to compare the display gamut against a target in its 3D Lab plot.
Step 03
Typical SDR Luminance
Open your calibration software, place the colorimeter probe flat against the centre of the screen, then trigger a 100% white patch. The software will show a live brightness reading in nits. In Calibrite Profiler 3 you can also read luminance under Advanced profiling — set the target to Custom, then Measured Luminance — which reports white point and luminance together.
DCI-P3
Run the colour gamut test in your calibration software. It displays a sequence of colour patches and automatically calculates what percentage of the DCI-P3 colour space the screen can reproduce.
sRGB
The same colour gamut test also measures sRGB coverage — no extra steps needed. Both results appear on the same summary page.
Delta E avg
Run the greyscale and colour accuracy test. The software calculates Delta E (ΔE) — a number that measures how far each displayed colour is from its target. Under 2.0 is considered accurate; anything above means recalibration is needed.
Reading gamut coverage: DCI-P3 and sRGB percentages require software that reports them (Calman, LightSpace, or ColourSpace above). The free Calibrite Profiler 3 bundled with the probe does not output coverage percentages — for a visual check, open Apple ColorSync Utility and compare the display gamut against the target standard in its 3D Lab plot.
If any metric falls outside these targets, run a full recalibration before using the display for colour-critical work.
Step 04
Open your calibration software (Calman, LightSpace, or ColourSpace) and start a new measurement session. Rest the colorimeter probe flat against the centre of the screen — the software will prompt you to display specific colour patches. Use ← → to cycle through them here, and tick each one off below once the software has recorded it.
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