Google appears black because the dark mode (or dark theme) is enabled on Google Search. Dark mode changes the background to a black or very dark color with light-colored text, which is designed to reduce eye strain in low-light conditions and save battery on devices with OLED screens. This mode is an option that users can toggle on or off in the Google Search settings. If you want to switch Google back to the traditional white background, you can disable dark mode by going to Google Search, clicking on the "Settings" menu (which might be in the lower right corner on desktop or in the menu on mobile), then selecting "Dark theme" to turn it off. Alternatively, Google Search can sync its theme with your device's system preferences, and you can set it to follow the device default theme.

In some cases, a black background might result from browser extensions or a glitch, but the primary reason is dark mode being enabled.

Summary:

• Google’s black appearance = Dark mode enabled
• Dark mode = dark background with light text to reduce eye strain
• Turn off dark mode via Google Search Settings > Dark theme
• Google can also follow your device’s theme settings

This explains why Google is black and how to revert it to normal if desired.