Microsoft Releases The New Light Theme In Windows 10 19H1 Insider Build 18282
However, this changes with the new build. To enable light theme in Windows 10, you oughta go to configs > Personalization > Colors. Then, grab the drop-down under Choose your color and select Light. If you grab the Light mode in the tweaks app, all system UI elements will look lighter. When you update to this build, your system color wont automatically change to the new light system color. This is because we want everything to be exactly as you left it before you did the update....