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Dark Theme for Windows

config/tweaks.json
1286  "WPFToggleDarkMode": {
1287    "Content": "Dark Theme for Windows",
1288    "Description": "Enable/Disable Dark Mode.",
1289    "category": "Customize Preferences",
1290    "panel": "2",
1291    "Type": "Toggle",
1292    "registry": [
1293      {
1294        "Path": "HKCU:\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Themes\\Personalize",
1295        "Name": "AppsUseLightTheme",
1296        "Value": "0",
1297        "Type": "DWord",
1298        "OriginalValue": "1",
1299        "DefaultState": "false"
1300      },
1301      {
1302        "Path": "HKCU:\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Themes\\Personalize",
1303        "Name": "SystemUsesLightTheme",
1304        "Value": "0",
1305        "Type": "DWord",
1306        "OriginalValue": "1",
1307        "DefaultState": "false"
1308      }
1309    ],
1310    "InvokeScript": [
1311      "
1312      Invoke-WinUtilExplorerUpdate
1313      if ($sync.ThemeButton.Content -eq [char]0xF08C) {
1314        Invoke-WinutilThemeChange -theme \"Auto\"
1315      }
1316      "
1317    ],
1318    "UndoScript": [
1319      "
1320      Invoke-WinUtilExplorerUpdate
1321      if ($sync.ThemeButton.Content -eq [char]0xF08C) {
1322        Invoke-WinutilThemeChange -theme \"Auto\"
1323      }
1324      "
1325    ],

Registry Changes

Applications and System Components store and retrieve configuration data to modify Windows settings, so we can use the registry to change many settings in one place.

You can find information about the registry on Wikipedia and Microsoft’s Website.