Google is once again testing out Dark theme for its Search page. The last time users reported seeing a dark theme was last month. Dark theme for the world's most visited page will follow your preferred Windows or macOS theme. If you've set yours to Light then Google Search will remain unchanged, set it to Dark and you'll be greeted with the new Dark theme. Dark theme doesn't make the background completely black, but rather a very dark grey. Text has changed from black to white while links seemingly remain blue. Google is still in the A/B testing phase so you may not have the...
Source: https://www.gsmarena.com/google_search_is_getting_dark_theme_will_match_your_preferred_theme-news-47702.php