Your Xbox One’s display settings can help you get more from its visuals, but the right choices depend on the game and your screen. Start with 4K and HDR, then review color depth and color space before calibrating the display.
Check 4K and HDR settings

The source lists Xbox One X twice as having built-in 4K features. With a 4K screen, these features can make games such as The Witcher 3 look clearer. HDR (High Dynamic Range) also improves contrast and expands the color gamut.
Open settings and check that these features are enabled rather than leaving their potential benefits unused.
Choose a suitable color depth

Color depth describes how many bits are used to reproduce on-screen colors. A higher setting can provide a wider color range and more vivid images, but the maximum is not necessarily the best choice: both your display and the game matter.
The Xbox One’s HDR10 generally works better with a 10-bit screen, although some support for 8-bit screens exists.
To change this setting, go to Settings > Display and Sound > Video Output > Colour Depth.
Consider PC RGB for a PC monitor
The console offers color-space options including the recommended standard settings and PC RGB. These determine the range of colors used with your display. If you play on a PC monitor, consider switching to PC RGB.
Be aware that the full RGB range can sometimes cause black crush, making details in dark scenes difficult or impossible to see. Although PC RGB is recommended for PC monitors, you may want to avoid it on a TV.
To change these settings, open Display and Sound, then Video Output, then Color Depth.
Finish with display calibration
After reviewing the settings above, use the console’s built-in calibration tool to check whether they suit your particular console and screen combination. Calibration also accounts for details such as ambient lighting and how your screen presents the image.
Go to Display and Sound > Video Output > Calibrate HDTV.
Follow the calibration prompts to adjust display settings including sharpness, brightness, and color, helping you get the best visuals from your setup.