PerfectChroma
Monitor Calibration User Guide

System Specifications

Display Requirements

PerfectChroma is compatible with any display that supports hardware LUT loading via its GPU driver pipeline. For full 3D LUT activation, your GPU driver must support VCGT (Video Card Gamma Table) injection — all modern NVIDIA, AMD, and Intel Arc drivers support this.

What You Cannot Calibrate

• Projectors (require separate projection-mode firmware)
• TVs connected via streaming device HDMI (use direct PC connection)
• Displays connected over VNC/RDP (no direct framebuffer access)

Colorimeters (All Tiers)

Colorimeters measure display light using three filtered photodetectors corresponding to the human visual system's tristimulus response (X, Y, Z). They are fast, affordable, and highly accurate on the display types they are calibrated for.

Spectrophotometers (Studio Pro & Enterprise)

Spectrophotometers measure the full spectral power distribution (380–780 nm) of emitted light. They are display-agnostic — they do not require correction matrices for specific panel technologies — making them ideal for WLED, OLED, and quantum dot displays.

Step 1 — Download the Installer

After completing your purchase, you will receive a confirmation email containing your License Key and a download link. This calibration software guide walks you through each step. The link is valid for 30 days and 5 download attempts. Download the appropriate installer for your OS:

• PerfectChroma-Setup-x64.exe — Windows 10/11 (64-bit)
• PerfectChroma-macOS.dmg — macOS 12+ (Intel & Apple Silicon Universal Binary)

Step 2 — Install the Application

Windows: Right-click the .exe and select "Run as Administrator." Accept the UAC prompt. Then choose your installation directory. In addition, the installer will place device drivers for supported USB colorimeters automatically.

macOS: Open the .dmg and drag PerfectChroma to your Applications folder. On first launch, allow the app in System Settings if macOS Gatekeeper blocks it. Subsequently, grant Screen Recording permission when prompted.

Step 3 — Activate Your License

On first launch, enter your License Key in the activation dialog. PerfectChroma will contact our licensing server to validate and register your device. A device activation consumes one activation slot from your license tier.

Step 4 — Connect Your Measurement Device

Plug your colorimeter or spectrophotometer into a USB port before launching PerfectChroma. The application will detect and identify the device automatically. If it is not detected, consult the Supported Instruments section for driver requirements.

Step 5 — Prepare Your Display

• Set your OS display scaling to 100% and disable any blue-light filter or Night Light/Night Shift mode.
• Open your monitor's OSD and reset it to factory defaults.
• Set brightness to your target luminance (typically 80–120 cd/m² for professional work, 48 cd/m² for broadcast).
• Allow the display to warm up for 30 minutes before measurement.

Main Toolbar

The top toolbar provides access to the five primary modules, accessible at any time:

Left Panel — Device & Display Status

The left panel shows real-time information about your connected measurement device (firmware version, temperature, last white point reading) and the active display being targeted (resolution, reported colorimetry from EDID, and the active ICC profile).

Center Panel — Workflow Canvas

The center panel hosts the active workflow. During calibration it shows the live measurement patch sequence, delta-E values per patch, and a running graph of the correction being built. During preset management it shows the preset card grid.

Right Panel — Target Selector

The right panel lets you select your calibration target standard. Available targets depend on your license tier. Each target shows its primaries (CIE xy coordinates), white point (D65/D50/DCI-P3 native), gamma / EOTF (2.2, 2.4, sRGB TRC, PQ, HLG), and peak luminance target in cd/m².

What is a Smart Preset?

A Smart Preset is a saved calibration result — a 3D LUT + ICC profile pair — for a specific target standard (e.g., sRGB D65 2.2, DCI-P3 D65 2.4, Rec.709 BT.1886). Loading a preset applies that calibrated profile to your display's GPU pipeline instantly, bypassing the 20–60 minute measurement process.

Creating a Preset

1. Run a full calibration session for your desired target standard (e.g., sRGB D65 γ2.2).
2. When the calibration completes, click "Save as Preset" in the summary screen.
3. Name the preset (e.g., "Main Monitor — sRGB Web") and add optional notes.
4. The preset is saved in your preset library with a timestamp and ΔE pass/fail result.

Loading a Preset

Open the Presets module from the toolbar. All saved presets are shown as cards with their target standard, creation date, average ΔE, and display model. Click any card → Apply Preset to load it. The GPU pipeline updates in under 3 seconds.

Preset Expiry & Re-calibration

Displays drift over time as their backlight ages. We recommend re-calibrating and updating your presets every 30 to 90 days depending on your display type. OLED panels are more stable than W-LED LCD panels and can often go 60–90 days. PerfectChroma will alert you when a preset exceeds its recommended age.

Keyboard Shortcut Binding (Studio Pro / Enterprise)

Studio Pro and Enterprise users can bind presets to global keyboard shortcuts for instant switching without opening PerfectChroma. Configure shortcuts in Settings → Preset Shortcuts.

When to Use Custom Targets

Standard targets like sRGB and DCI-P3 cover most workflows. Custom targets are used when you need to match a specific reference monitor's measured primaries, calibrate to an unusual editorial white point (e.g., D55 or D75), or comply with a facility's internal color specification that doesn't match any published standard.

Defining a Custom White Point

Navigate to Calibrate → Target → Custom. Set the white point using either:

• CCT (Correlated Color Temperature) — Enter a value in Kelvin (e.g., 5000K, 6500K, 9300K).
• CIE xy Chromaticity — Enter the exact x, y coordinates for the target white point (e.g., D65: x=0.3127, y=0.3290).

Defining Custom Primaries

Enter the CIE xy chromaticity coordinates for all three primaries (Red, Green, Blue) to define a custom gamut container. For example, to target SMPTE C (EBU Tech 3213): R(0.630, 0.340), G(0.310, 0.595), B(0.155, 0.070).

Custom Gamma / EOTF

Choose from simple power-law gamma (γ 1.0–3.0 in 0.1 increments), the sRGB compound TRC, BT.1886 EOTF, or import a custom tone response curve as a 1D LUT file in .cube or .csv format.

The Challenge of Multi-Monitor Environments

Even two identical monitors from the same production batch can vary by ΔE2000 > 2.0 due to panel binning variance, backlight aging differences, and thermal drift. PerfectChroma eliminates this variance by calibrating each display independently to an identical mathematical target, then applying matching profiles simultaneously.

Session Workflow

1. Connect all displays to your workstation and open PerfectChroma.
2. In the Display Selector panel, choose "Multi-Monitor Session" and select all target displays.
3. Set a common calibration target for all displays (e.g., sRGB D65, 120 cd/m²).
4. PerfectChroma sequentially measures and calibrates each display using your connected instrument.
5. When all calibrations complete, click "Apply All" to simultaneously inject all profiles into the GPU pipeline.

White Luminance Normalization

The most critical step after gamut matching is luminance matching. PerfectChroma measures the native peak white of each display and calculates a common target luminance that all displays can reach. Brighter displays are dimmed to match the dimmest display in the chain, ensuring perceptual consistency.

Saving a Multi-Monitor Preset Pack

Save the entire matched session as a Preset Pack (Studio Pro / Enterprise). A Preset Pack contains one preset per display, all targeting the same standard. Loading the pack applies all presets simultaneously to their matched displays.

How the 3D Gamut Viewer Works

As detailed in this display calibration guide, PerfectChroma samples your display's ICC profile across multiple CIELAB lightness planes (L* = 10 through L* = 90 in configurable steps). At each L* slice, it computes the convex hull of reproducible colors on that plane. Consequently, the result is a volumetric 3D mesh representing your display's entire reproducible color body in perceptually uniform CIELAB space.

This reveals information hidden from 2D diagrams: shadow gamut compression (colors that look saturated in mid-tones become crushed at L* < 20), highlight desaturation (near-white regions lose saturation as lumiance increases), and hue-dependent volume asymmetry (most displays expand more toward green than toward red at any given lightness).

Overlay Comparisons

Load any reference profile to overlay on your display's gamut mesh. Available overlays:

• sRGB (IEC 61966-2-1)
• Adobe RGB (1998)
• DCI-P3
• Display P3
• Rec. 2020
• Any custom ICC profile (drag & drop)

Out-of-gamut regions — colors representable in the reference but not on your display — are rendered in red. This is immediately diagnostic for print-to-screen soft-proofing workflows.

Export & Share

Export the 3D gamut mesh as a .PNG screenshot or an interactive .glb 3D model file for inclusion in color facility reports.

What is Spot Measurement?

Spot Measurement places your colorimeter or spectrophotometer against any point on your display to report its exact CIE XYZ, CIELAB, and CIE xy values in real time. This is used to debug specific problem areas — for example, if saturated reds appear too orange in your graded footage, Spot Measurement will tell you the exact ΔE2000 error of red primaries versus your target standard.

Screen Uniformity Mode

In Uniformity Mode, PerfectChroma guides you to measure a configurable grid of points across your display surface (5×5, 7×7, or 9×9). The results are rendered as a false-color heatmap showing luminance variation (typically ±5–15% on consumer displays, ±2–5% on professional panels) and white point drift across the panel surface.

Ambient Light Measurement

Many colorimeters include an ambient light sensor. Point the device towards your room lighting to measure and record your ambient illuminance (lux) and CCT. This data is included in verification PDF reports to document the measurement environment.

What is a Verification Report?

A Verification Report is a PDF document generated after a post-calibration patch measurement session. It records the color accuracy of your calibrated display against 100 or 250 test patches (depending on license tier), calculating ΔE2000 for each patch and producing statistical summaries: mean ΔE, maximum ΔE, and pass/fail verdict against your chosen accuracy threshold.

Running a Verification Session

1. After applying your calibration or loading a preset, open the Verify module.
2. Select the patch set size: 100 patches (Studio Pro) or 250 patches (Enterprise).
3. Position your measurement device centrally on the display.
4. Click Start Verification. The session takes approximately 3–15 minutes depending on patch count and device speed.
5. When complete, review the ΔE2000 results on-screen, then click Export PDF.

Report Contents

• Display model, serial number, and measurement date/time (UTC-stamped)
• Calibration target standard (primaries, white point, EOTF)
• Measurement instrument model and firmware version
• Per-patch L*a*b* target vs. measured values and individual ΔE2000
• Statistical summary: mean ΔE, max ΔE, 95th percentile ΔE, pass/fail
• CIE xy chromaticity diagram showing measured vs. target primaries
• CIELAB ΔE2000 error distribution histogram
• Ambient light conditions (lux, CCT) at time of measurement
• Digital signature and PerfectChroma report ID for authenticity verification

Platform Acceptance & Compliance

PerfectChroma verification reports are structured to align with EBU R137, SMPTE RP 431-2, and ITU-R BT.2111 documentation guidelines. Therefore, you may submit your report PDF directly to Netflix Partner Portal, Disney Partner Portal, or BBC R&D engineering contacts for facility approval.

What is a 3D LUT?

As covered in this monitor calibration user guide, a 3D Look-Up Table (LUT) is a three-dimensional grid of input-to-output color mappings. Each node in the grid specifies what output RGB value should replace a given input RGB value. Therefore, PerfectChroma generates 3D LUTs from your calibration measurement data to encode your display's color correction as a portable file format, readable by almost any professional video and color management application.

LUT Resolution & Tier

Supported LUT Formats

• .cube (Adobe / DaVinci Resolve standard) — 32-bit float precision
• .3dl (Autodesk / Flame) — 12-bit or 16-bit integer
• .clf (Common LUT Format, ACES) — full metadata support
• .icc / .icm — ICC v4 profile for use in OS color management

Exporting a LUT

1. Complete a calibration session or load a saved preset.
2. Open Reports → Export LUT.
3. Choose your target format and grid resolution.
4. Optionally include a shaper LUT (log-to-display encoding for use in ACES/log workflows).
5. Click Export and choose your file destination.

Using Your LUT in DaVinci Resolve

Copy your exported .cube to: ~/Library/Application Support/Blackmagic Design/DaVinci Resolve/LUT (macOS) or C:\ProgramData\Blackmagic Design\DaVinci Resolve\Support\LUT (Windows). In Resolve, apply it as a Monitor LUT in the display output settings to softproof your grade on a calibrated display.