Calibrating the color of your Dell OLED monitor is essential to ensure accurate and consistent color representation, especially if you're involved in tasks like photo editing, graphic design, or video production. Here's a step-by-step guide on how to calibrate the color of your Dell OLED monitor:

1. Prepare Your Monitor and Workspace:

• Make sure your monitor is powered on and has been running for at least 30 minutes to stabilize the temperature.
• Ensure your workspace has controlled lighting conditions to minimize glare and reflections on the screen.

2. Use Hardware Calibration Tools (Recommended):

• For the most accurate results, it's best to use a hardware calibration tool like the X-Rite i1Display Pro or Datacolor Spyder series.
• Connect the calibration tool to your computer and follow the manufacturer's instructions for software installation and setup.

3. Adjust Monitor Settings:

• Access your monitor's OSD (On-Screen Display) menu. You can typically do this using physical buttons on the monitor or via Dell's Display Manager software.
• Set your monitor to its native resolution and refresh rate.
• Reset any custom color settings to their default values.

4. Calibrate with the Hardware Tool:

• Launch the calibration software that came with your hardware tool.
• Follow the on-screen instructions provided by the calibration tool.
• The tool will display various colors and shades on your monitor, and it will measure how they appear to adjust settings accordingly.

5. Adjust Software Settings:

• After calibration, the software will generate a color profile that corrects your monitor's color output.
• Apply the generated color profile in your operating system's display settings. On Windows, you can do this by going to "Settings" > "System" > "Display" > "Advanced display settings" > "Color calibration."
• On macOS, navigate to "System Preferences" > "Displays" > "Color" and select the newly created profile.

6. Fine-Tune Settings (Optional):

• Depending on your specific needs and preferences, you may want to make further adjustments to brightness, contrast, and color temperature through your monitor's OSD or graphics driver settings.

7. Regularly Re-Calibrate:

• Keep in mind that monitor color calibration should be a regular practice to maintain accuracy over time. How often you recalibrate depends on your usage and the criticality of color accuracy.

8. Verify Calibration:

• After calibration, it's a good idea to verify the accuracy of your monitor's colors by viewing test images or using color-checking software to ensure that the colors appear as expected.

Remember that the calibration process may vary slightly depending on the specific model of your Dell OLED monitor and the calibration tool you're using. Always refer to the manufacturer's instructions for the most accurate guidance. Calibration ensures that your Dell OLED monitor displays colors as accurately as possible, which is crucial for professional work involving color-sensitive tasks.

@AdrianG001​ At datacolor they do not recommed using their product for calibrating OLED screens. 

From their website:

"While it may be possible to use the Spyder X/X2 to calibrate certain types of OLED displays, we cannot guarantee the accuracy of the resulting calibration. Currently, we do not recommend using a Spyder X/X2 to calibrate any type of OLED display for color-critical applications."

I haven't found a hardware solution for myself yet. 

At this point I used the 'My dell' app on my XPS and there is a function 'color and display' wiht a few presets. Default it's on 'vibrant' and I changed this to 'photo'. For me this solved the oversaturation of some colors. I'm not sure how color accurate it is, but good enough for me untill there is a hardware calibration tool that I can use for Oled screesn.