diff --git a/Extension/package.json b/Extension/package.json
index 100a842b3..2233caec8 100644
--- a/Extension/package.json
+++ b/Extension/package.json
@@ -12,7 +12,7 @@
   },
   "license": "SEE LICENSE IN LICENSE.txt",
   "engines": {
-    "vscode": "^1.22.0"
+    "vscode": "^1.23.0"
   },
   "bugs": {
     "url": "https://github.com/Microsoft/vscode-cpptools/issues",
@@ -146,6 +146,14 @@
           "description": "Controls whether inactive preprocessor blocks are colored differently than active code. This setting is ignored by the Tag Parser engine.",
           "scope": "resource"
         },
+        "C_Cpp.inactiveRegionOpacity": {
+          "type:": "number",
+          "default": 0.55,
+          "Description": "Controls the opacity of inactive preprocessor blocks. Scales between 0.1 and 1.0. This setting only applies when inactive region dimming is enabled.",
+          "scope": "resource",
+          "minimum": 0.1,
+          "maximum": 1
+        },
         "C_Cpp.formatting": {
           "type": "string",
           "enum": [
@@ -1481,4 +1489,4 @@
       "binaries": []
     }
   ]
-}
+}
\ No newline at end of file
diff --git a/Extension/src/LanguageServer/client.ts b/Extension/src/LanguageServer/client.ts
index 4010d3953..acb288097 100644
--- a/Extension/src/LanguageServer/client.ts
+++ b/Extension/src/LanguageServer/client.ts
@@ -705,12 +705,12 @@ class DefaultClient implements Client {
     }
 
     private updateInactiveRegions(params: InactiveRegionParams): void {
-        let renderOptions: vscode.DecorationRenderOptions = {
-            light: { color: "rgba(175,175,175,1.0)" },
-            dark: { color: "rgba(155,155,155,1.0)" },
+        let settings: CppSettings = new CppSettings(this.RootUri);
+        
+        let decoration: vscode.TextEditorDecorationType = vscode.window.createTextEditorDecorationType({
+            opacity: settings.inactiveRegionOpacity.toString(),
             rangeBehavior: vscode.DecorationRangeBehavior.ClosedOpen
-        };
-        let decoration: vscode.TextEditorDecorationType = vscode.window.createTextEditorDecorationType(renderOptions);
+        });
 
         // We must convert to vscode.Ranges in order to make use of the API's
         let ranges: vscode.Range[] = [];
@@ -736,7 +736,6 @@ class DefaultClient implements Client {
             this.inactiveRegionsDecorations.set(params.uri, toInsert);
         }
 
-        let settings: CppSettings = new CppSettings(this.RootUri);
         if (settings.dimInactiveRegions) {
             // Apply the decorations to all *visible* text editors
             let editors: vscode.TextEditor[] = vscode.window.visibleTextEditors.filter(e => e.document.uri.toString() === params.uri);
diff --git a/Extension/src/LanguageServer/settings.ts b/Extension/src/LanguageServer/settings.ts
index 40a3557f9..766142db6 100644
--- a/Extension/src/LanguageServer/settings.ts
+++ b/Extension/src/LanguageServer/settings.ts
@@ -40,6 +40,7 @@ export class CppSettings extends Settings {
     public get intelliSenseEngineFallback(): string { return super.Section.get<string>("intelliSenseEngineFallback"); }
     public get errorSquiggles(): string { return super.Section.get<string>("errorSquiggles"); }
     public get dimInactiveRegions(): boolean { return super.Section.get<boolean>("dimInactiveRegions"); }
+    public get inactiveRegionOpacity(): number { return super.Section.get<number>("inactiveRegionOpacity"); }
     public get autoComplete(): string { return super.Section.get<string>("autocomplete"); }
     public get loggingLevel(): string { return super.Section.get<string>("loggingLevel"); }
     public get navigationLength(): number { return super.Section.get<number>("navigation.length", 60); }