0XC02625DF

Fix 0xC02625DF: MCA Unsupported Color Temperature Error

EP
Erropedia Team
📅 May 26, 2026 📅 Updated Jul 31, 2026 👁 9 views Windows Errors Intermediate
Your graphics driver or monitor rejected a color temperature command. Quick fix: change display settings or update driver.

What's Actually Happening Here

Error 0xC02625DF (ERROR_GRAPHICS_MCA_UNSUPPORTED_COLOR_TEMPERATURE) means Windows tried to set a color temperature value your monitor's internal lookup table can't process. The MCA (Monitor Control API) part is key—it's the protocol used by DDC/CI to talk to your display. Your graphics driver issued a command via MCA, but the monitor said “nope, can't do that.”

This usually pops up when you're using monitor calibration software, NVIDIA Color Settings, or a custom ICC profile that pushed a temperature outside the monitor's supported range—like 6500K when the monitor only does 5000K or 9300K. I've seen it most often on Dell and LG monitors from 2018-2020 after a Windows 11 22H2 update that changed how DDC/CI gets handled.

30-Second Fix: Reset Color Temperature in Display Settings

This works if the error just appeared after messing with display settings. Here's what you do:

  1. Right-click on your desktop and pick Display settings.
  2. Scroll down to HDR (if available) or Color profile and turn off any custom color temperature setting.
  3. Open your graphics driver control panel (NVIDIA Control Panel, AMD Adrenalin, or Intel Graphics Command Center) and reset color settings to default. On NVIDIA, that's under Display > Adjust desktop color settings—click Restore defaults.
  4. Reboot. The error should stop.

Why this works: the driver was holding onto a color temperature command the monitor rejected. Resetting kills that command. Most people stop here.

5-Minute Fix: Disable DDC/CI or Switch Color Input

If the quick reset didn't stick, the monitor's DDC/CI bus is likely fighting with the driver. This is common on dual-monitor setups where one display is older.

  1. Press your monitor's physical buttons to open the on-screen display (OSD).
  2. Look for a setting called DDC/CI, PC/AV mode, or Input detection. Disable DDC/CI.
  3. If you can't find DDC/CI, toggle the monitor's input between HDMI and DisplayPort (or vice versa) and back again—this forces a renegotiation of the EDID block, which contains the supported color temperature range.
  4. Save and exit. Restart your PC.

The reason step 3 works: the EDID tells Windows what color temperatures your monitor supports. Reseating the input forces the monitor to re-send that data, which sometimes clears a corrupted EDID cache the driver was using.

If the error still shows up, skip the next fix if you're not comfortable editing drivers—it's more involved.

15+ Minute Fix: Manually Override the Monitor's Supported Color Ranges in Registry

This is the nuclear option. You're telling the driver to ignore the monitor's reported limitations and use a standard sRGB temperature range instead. Only do this if you're comfortable editing the Windows Registry.

  1. Open Device Manager (Win + X > Device Manager).
  2. Expand Monitors, right-click your monitor, pick Properties > Details tab, and select Hardware Ids. Write down the four-character vendor ID (e.g., DEL for Dell) and product ID.
  3. Open regedit.exe (Run as admin).
  4. Navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\DISPLAY\[YourMonitorID]\[InstanceID]\Device Parameters\Monitor\
  5. Look for a DWORD named SupportedColorTemperatures. If it doesn't exist, create it (right-click > New > DWORD). Set its value to 7 (hex)—this enables 5000K, 6500K, and 9300K, the widest range most monitors actually support even if they report less.
  6. Also check for ColorTemperatureDefault. Set it to 6500 (decimal).
  7. Close regedit and restart.

Why the registry edit works: the monitor originally reported a narrower color temperature range (maybe only 6500K and 9300K). The driver then tried to set 5000K (common in calibration software), and the monitor's MCA interface rejected it. By overriding the supported range to include 5000K, the driver now thinks the monitor accepts it—but your monitor still won't display it correctly. This stops the error message at the cost of potentially inaccurate colors. Use only as a last resort.

Warning: This override can cause color banding or incorrect gamma if your monitor truly can't display that temperature. Test with a solid gray background in Paint after the reboot. If you see artifacts, set SupportedColorTemperatures back to whatever it was before (usually 3 or 5).

If none of this cleared the error, the monitor's firmware might be buggy. Check your monitor manufacturer's support page for a firmware update—LG and Dell sometimes release them via USB. Or swap the cable for a certified HDMI 2.1 or DisplayPort 1.4 cable; old cables can corrupt EDID data.

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EP
Erropedia Team
Tech Support Editors
The Erropedia editorial team researches and documents real-world tech errors from across Windows, Linux, macOS, networking, databases, cloud platforms, and more. Every solution is reviewed for accuracy and updated as software and systems evolve.