Earlier this week, Google released the Chrome 71, but the latest version of Chrome still not support macOS Mojave's Dark Mode. However, according to Reddit, a Google developer recently submitted a code change on the Chromium Project to implement a system-level dark mode. For those unknown, Chromium is the foundation of the open source project for Chrome.
Currently, the code change has passed the review phase and will be available in Chrome in the future. There are several versions of Chrome that were developed at the same time to facilitate testing and deploying new features. All code changes will appear in Chromium as early as possible, and then enter the Canary version, or the Chrome beta, and finally the stable version of Chrome.
Since Google updates Chrome every six weeks or so, it's likely the company will release the Chrome with Dark Mode support in early 2019, for now. the feature in Chromium is still hidden and requires a terminal command to enable it. Honestly, the completion is still relatively high, the search box, tabs, bookmarks bar, status bar, and dialog box have all turned black,
Surely, the Dark Mode is being tested and some changes may occur in the future. Also, the Incognito Mode in Chrome turns the browser black, still the new dark mode is distinguished from the Incognito Mode. We expect Google Chrome to support Dark Mode either in 72 or 73 version.