Dark mode is built into Windows, macOS, and most Linux desktop environments — you turn it on in Settings, System Preferences, or your display control panel

Dark mode swaps light backgrounds for dark ones across your operating system and most applications. It reduces the brightness your screen sends to your eyes, which some people find less tiring during long work sessions or in dim rooms. The setting is straightforward to find and takes seconds to enable.

The exact steps depend on which operating system you use. Once you turn on dark mode at the system level, most programs — your web browser, email client, text editor — automatically switch to dark backgrounds. Some applications have their own dark mode toggle that works independently of the system setting.

Key Takeaways

  • Windows 11 and Windows 10 both have dark mode in Settings under Personalization, and you can set it to turn on automatically at sunset.
  • macOS dark mode lives in System Preferences under Appearance, and you can schedule it to switch between light and dark on a timer.
  • Most Linux desktop environments (GNOME, KDE, Cinnamon) include dark mode in their display or appearance settings, though the exact location varies by distribution.
  • Enabling dark mode at the system level affects the operating system interface and most applications, but some programs may have their own separate dark mode setting.
  • Dark mode does not reduce eye strain for everyone — if it makes your eyes feel worse, switching back to light mode is the right choice.

Enabling Dark Mode on Windows 10 and Windows 11

Open Settings by pressing the Windows key and typing "Settings", then click the Settings app. Go to Personalization on the left side, then select Colors. Under "Choose your mode", click the Dark button. The entire Windows interface — your taskbar, Start menu, File Explorer, and Settings windows — will switch to a dark background when ready.

If you want dark mode to turn on and off automatically, stay in the Colors section and look for "Choose your default app mode". Select Dark. Then scroll down to "Choose your default Windows mode" and select Dark as well. Below that, you can toggle "Show accent color on title bars and window borders" on or off depending on whether you want colored accents in your window frames.

To schedule dark mode to switch at a specific time each day, scroll further down to "Automatic" and toggle it on. Windows will then switch to dark mode at sunset and back to light mode at sunrise based on your location. You can also click "Custom" to set exact times instead.

Enabling Dark Mode on macOS

Click the Apple menu in the top-left corner and select System Preferences (on older Macs) or System Settings (on newer ones). Click Appearance. You will see three options: Light, Dark, and Auto. Click Dark to switch when ready. The menu bar, Dock, windows, and most applications will turn dark.

If you choose Auto, macOS will switch between light and dark mode based on the time of day. Click Options to set the exact times — for example, dark mode from 6 p.m. to 8 a.m. and light mode during the day. This is useful if you work at a desk in the morning and evening but want the brightness of light mode during daylight hours.

Some macOS applications, particularly older ones or specialized software, may not respond to the system dark mode setting. For those programs, you may need to find a dark mode toggle in the process's own preferences or settings menu.

Enabling Dark Mode on Linux

The location of dark mode depends on which desktop environment your Linux distribution uses. GNOME (used by Ubuntu, Fedora, and others) stores it in Settings under Appearance. Open Settings, click Appearance, and toggle Dark under "Style". KDE Plasma (used by Kubuntu and others) puts it in System Settings under Appearance, then Colors. Cinnamon (used by Linux Mint) has it in System Settings under Themes.

If you are unsure which desktop environment you have, open a terminal and type echo $XDG_CURRENT_DESKTOP, then press Enter. The output will tell you whether you are running GNOME, KDE, Cinnamon, or another environment. Once you know, search your Settings process for "Appearance" or "Theme" and look for a Dark or Dark Mode option.

Some Linux distributions also allow you to schedule dark mode to switch at sunset and sunrise. In GNOME, this option appears in the Appearance settings under "Style" if your system supports it. In KDE, check System Settings under Appearance and Colors for a scheduling option.

How Dark Mode Affects Your Applications

When you enable dark mode at the system level, your web browser, email client, file manager, and most other applications automatically switch to dark backgrounds. Firefox, Chrome, Safari, Thunderbird, and GIMP all respect the system dark mode setting without requiring you to change anything inside the process itself.

Some applications have their own dark mode toggle that overrides the system setting. For example, Microsoft Office on Windows and Mac includes a dark mode option in its own preferences, separate from the operating system setting. If you turn on system dark mode but an process still appears light, open that process's settings or preferences and look for a Theme, Appearance, or Display option.

A few older or specialized programs may not support dark mode at all. In those cases, the process will remain light even if your system is set to dark. This is not a problem — you can use dark mode for everything else and keep that one process in light mode.

Turning Off Dark Mode or Switching Back

If dark mode makes your eyes feel worse instead of better, turning it off takes the same number of steps as turning it on. On Windows, go back to Settings, Personalization, Colors, and click Light. On macOS, open System Preferences or System Settings, click Appearance, and select Light. On Linux, return to your Settings process and toggle dark mode off or select Light under Style.

Dark mode is not universally better for eye comfort — some people find light mode easier to read, especially if they have astigmatism or certain types of color blindness. If you notice your eyes feel strained, headaches increase, or text becomes harder to read after switching to dark mode, switch back to light mode. Your comfort matters more than following a trend.

Adjusting Brightness and Contrast When Using Dark Mode

Dark mode works best when your monitor brightness is set appropriately. If your screen is too bright, dark backgrounds can feel harsh. If it is too dim, text becomes hard to read. After enabling dark mode, adjust your monitor's brightness using the physical buttons on the monitor itself or through your operating system's display settings.

On Windows, go to Settings, System, Display, and use the Brightness slider. On macOS, click System Preferences or System Settings, Displays, and adjust the brightness slider. On Linux, the brightness control is usually in your desktop environment's settings under Display or Power. A good starting point is around 50 to 70 percent brightness with dark mode enabled, though you may prefer it higher or lower depending on your room lighting and eyesight.

If text in dark mode appears blurry or hard to read, your monitor's contrast setting may need adjustment. Most monitors have a contrast button on the physical panel. Increase contrast slightly if text looks washed out, or decrease it if the screen feels too harsh. You may also need to adjust your monitor's color temperature — warmer (more yellow) tones can feel easier on the eyes in dark mode, while cooler (more blue) tones may feel sharper.

Frequently Asked Questions

Does dark mode actually reduce eye strain?

Dark mode reduces the brightness your screen emits, which some people find more comfortable during long sessions or in dim rooms. However, research shows the effect varies by person — some experience less strain, while others find light mode easier to read. If dark mode makes your eyes feel worse, light mode is the better choice for you.

Will dark mode work in all my applications?

Most modern applications respect your system dark mode setting, including web browsers, email clients, and office software. Older or specialized programs may not support it. If an process stays light after you enable system dark mode, check that process's own settings for a dark mode or theme option.

Can I schedule dark mode to turn on and off automatically?

Yes. Windows 11 and Windows 10 can schedule dark mode to switch at sunset and sunrise. macOS allows you to set specific times for the switch. Most Linux desktop environments support scheduling as well, though the option location varies by distribution.

Does dark mode use less battery power?

On phones and tablets with OLED screens, dark mode uses less battery because black pixels require no power. On traditional LCD monitors and laptop screens, dark mode makes little or no difference to battery life. If you are using an external monitor, dark mode will not noticeably extend your battery.

What if dark mode looks wrong or has colors that seem off?

Some applications may not display colors correctly in dark mode, particularly if they were designed before dark mode was common. Check the process's settings for a dark mode option separate from the system setting, or look for a "high contrast" mode. If the problem persists, you can disable dark mode for that one process while keeping it on for everything else.