Google has released Chrome 74 into the beta channel and with it comes the browser’s highly anticipated Dark Mode feature for Windows 10. In Chrome 74, Google has finally made it possible for Chrome to detect when dark mode is enabled in Windows 10 and switch to dark mode in the browser. Unfortunately, the synchronization still has some bugs to work out. Chrome 74 is expected to be released on April 23rd, 2019 and Windows 10 Build 1903 is slated for April as well. Other features that are being worked on for Chrome 74 are the ability to prevent web sites from detecting when your in incognito mode and warnings about lookalike urls.
Source: https://www.bleepingcomputer.com/news/google/chrome-74-dark-mode-now-syncs-with-windows-10-color-settings/