diff --git a/patched-vscode/build/gulpfile.extensions.js b/patched-vscode/build/gulpfile.extensions.js
index d5d57f6d2..12eb6ee72 100644
--- a/patched-vscode/build/gulpfile.extensions.js
+++ b/patched-vscode/build/gulpfile.extensions.js
@@ -64,6 +64,7 @@ const compilations = [
 	'extensions/sagemaker-idle-extension/tsconfig.json',
 	'extensions/sagemaker-terminal-crash-mitigation/tsconfig.json',
 	'extensions/sagemaker-open-notebook-extension/tsconfig.json',
+	'extensions/sagemaker-ui-dark-theme/tsconfig.json',
 	'extensions/tunnel-forwarding/tsconfig.json',
 	'extensions/typescript-language-features/test-workspace/tsconfig.json',
 	'extensions/typescript-language-features/web/tsconfig.json',
diff --git a/patched-vscode/build/npm/dirs.js b/patched-vscode/build/npm/dirs.js
index ae459ee0b..454eebc97 100644
--- a/patched-vscode/build/npm/dirs.js
+++ b/patched-vscode/build/npm/dirs.js
@@ -43,6 +43,7 @@ const dirs = [
 	'extensions/sagemaker-idle-extension',
 	'extensions/sagemaker-terminal-crash-mitigation',
 	'extensions/sagemaker-open-notebook-extension',
+	'extensions/sagemaker-ui-dark-theme',
 	'extensions/search-result',
 	'extensions/simple-browser',
 	'extensions/tunnel-forwarding',
diff --git a/patched-vscode/extensions/sagemaker-ui-dark-theme/.vscodeignore b/patched-vscode/extensions/sagemaker-ui-dark-theme/.vscodeignore
new file mode 100644
index 000000000..56b78554c
--- /dev/null
+++ b/patched-vscode/extensions/sagemaker-ui-dark-theme/.vscodeignore
@@ -0,0 +1,12 @@
+.vscode/**
+.vscode-test/**
+out/test/**
+out/**
+test/**
+src/**
+tsconfig.json
+out/test/**
+out/**
+cgmanifest.json
+yarn.lock
+preview-src/**
diff --git a/patched-vscode/extensions/sagemaker-ui-dark-theme/README.md b/patched-vscode/extensions/sagemaker-ui-dark-theme/README.md
new file mode 100644
index 000000000..34c4d69c0
--- /dev/null
+++ b/patched-vscode/extensions/sagemaker-ui-dark-theme/README.md
@@ -0,0 +1 @@
+# SageMaker UI Dark Theme
diff --git a/patched-vscode/extensions/sagemaker-ui-dark-theme/extension-browser.webpack.config.js b/patched-vscode/extensions/sagemaker-ui-dark-theme/extension-browser.webpack.config.js
new file mode 100644
index 000000000..68271e0e9
--- /dev/null
+++ b/patched-vscode/extensions/sagemaker-ui-dark-theme/extension-browser.webpack.config.js
@@ -0,0 +1,17 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright Amazon.com Inc. or its affiliates. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+//@ts-check
+
+'use strict';
+
+const withBrowserDefaults = require('../shared.webpack.config').browser;
+
+module.exports = withBrowserDefaults({
+    context: __dirname,
+    entry: {
+        extension: './src/extension.ts'
+    },
+});
diff --git a/patched-vscode/extensions/sagemaker-ui-dark-theme/extension.webpack.config.js b/patched-vscode/extensions/sagemaker-ui-dark-theme/extension.webpack.config.js
new file mode 100644
index 000000000..598526267
--- /dev/null
+++ b/patched-vscode/extensions/sagemaker-ui-dark-theme/extension.webpack.config.js
@@ -0,0 +1,20 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright Amazon.com Inc. or its affiliates. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+//@ts-check
+
+'use strict';
+
+const withDefaults = require('../shared.webpack.config');
+
+module.exports = withDefaults({
+    context: __dirname,
+    resolve: {
+        mainFields: ['module', 'main']
+    },
+    entry: {
+        extension: './src/extension.ts',
+    }
+});
diff --git a/patched-vscode/extensions/sagemaker-ui-dark-theme/package.json b/patched-vscode/extensions/sagemaker-ui-dark-theme/package.json
new file mode 100644
index 000000000..2c6c0f068
--- /dev/null
+++ b/patched-vscode/extensions/sagemaker-ui-dark-theme/package.json
@@ -0,0 +1,46 @@
+{
+  "name": "sagemaker-ui-dark-theme",
+  "displayName": "SageMaker UI Dark Theme",
+  "description": "SageMaker UI Dark Theme",
+  "extensionKind": [
+    "workspace"
+  ],
+  "version": "1.0.0",
+  "publisher": "sagemaker",
+  "license": "MIT",
+  "engines": {
+    "vscode": "^1.70.0"
+  },
+  "main": "./out/extension",
+  "categories": [
+    "Other"
+  ],
+  "activationEvents": [
+    "onStartupFinished"
+  ],
+  "capabilities": {
+    "virtualWorkspaces": true,
+    "untrustedWorkspaces": {
+      "supported": true
+    }
+  },
+  "contributes": {
+    "configuration": {
+      "type": "object",
+      "title": "SageMaker UI Dark Theme",
+      "properties": {}
+    },
+    "commands": [
+    ]
+  },
+  "scripts": {
+    "compile": "gulp compile-extension:sagemaker-ui-dark-theme",
+    "watch": "npm run build-preview && gulp watch-extension:sagemaker-ui-dark-theme",
+    "vscode:prepublish": "npm run build-ext",
+    "build-ext": "node ../../node_modules/gulp/bin/gulp.js --gulpfile ../../build/gulpfile.extensions.js compile-extension:sagemaker-ui-dark-theme ./tsconfig.json"
+  },
+  "dependencies": {
+  },
+  "repository": {
+  }
+}
diff --git a/patched-vscode/extensions/sagemaker-ui-dark-theme/src/extension.ts b/patched-vscode/extensions/sagemaker-ui-dark-theme/src/extension.ts
new file mode 100644
index 000000000..8f6395a02
--- /dev/null
+++ b/patched-vscode/extensions/sagemaker-ui-dark-theme/src/extension.ts
@@ -0,0 +1,51 @@
+import * as vscode from 'vscode';
+
+const SERVICE_NAME_ENV_KEY = 'SERVICE_NAME';
+const SERVICE_NAME_ENV_VALUE = 'SageMakerUnifiedStudio';
+const DEFAULT_THEME = 'Default Dark Modern';
+
+let outputChannel: vscode.OutputChannel;
+
+export function activate() {
+    // Check if in SageMaker Unified Studio
+    const envValue = process.env[SERVICE_NAME_ENV_KEY];
+    if (!envValue || envValue !== SERVICE_NAME_ENV_VALUE) {
+        return;
+    }
+
+    const config = vscode.workspace.getConfiguration();
+    const themeConfig = config.inspect('workbench.colorTheme');
+    outputChannel = vscode.window.createOutputChannel('SageMaker UI Dark Theme');
+
+    outputChannel.appendLine(`Current theme configuration: ${JSON.stringify(themeConfig, null, 2)}`);
+
+    // Check if theme is only set at default level
+    if (themeConfig?.globalValue === undefined &&
+        themeConfig?.workspaceValue === undefined &&
+        themeConfig?.workspaceFolderValue === undefined) {
+
+        outputChannel.appendLine('Theme only set at default level, applying theme update');
+
+        // Update the configuration
+        Promise.resolve(
+            config.update('workbench.colorTheme', DEFAULT_THEME, vscode.ConfigurationTarget.Global)
+                .then(() => {
+                    outputChannel.appendLine(`Theme configuration updated to ${DEFAULT_THEME}`);
+                    // Reload to apply theme
+                    return vscode.commands.executeCommand('workbench.action.reloadWindow');
+                })
+                .then(() => outputChannel.appendLine('Theme applied successfully'))
+        )
+        .catch((error) => {
+            outputChannel.appendLine(`Failed to apply theme: ${error}`);
+        });
+    } else {
+        outputChannel.appendLine('Theme already configured in user or workspace settings, not overriding');
+    }
+}
+
+export function deactivate() {
+    if (outputChannel) {
+        outputChannel.dispose();
+    }
+}
diff --git a/patched-vscode/extensions/sagemaker-ui-dark-theme/tsconfig.json b/patched-vscode/extensions/sagemaker-ui-dark-theme/tsconfig.json
new file mode 100644
index 000000000..fcd79775d
--- /dev/null
+++ b/patched-vscode/extensions/sagemaker-ui-dark-theme/tsconfig.json
@@ -0,0 +1,10 @@
+{
+	"extends": "../tsconfig.base.json",
+	"compilerOptions": {
+		"outDir": "./out"
+	},
+	"include": [
+		"src/**/*",
+		"../../src/vscode-dts/vscode.d.ts"
+	]
+}
diff --git a/patched-vscode/extensions/sagemaker-ui-dark-theme/yarn.lock b/patched-vscode/extensions/sagemaker-ui-dark-theme/yarn.lock
new file mode 100644
index 000000000..fb57ccd13
--- /dev/null
+++ b/patched-vscode/extensions/sagemaker-ui-dark-theme/yarn.lock
@@ -0,0 +1,4 @@
+# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
+# yarn lockfile v1
+
+
diff --git a/patched-vscode/package.json b/patched-vscode/package.json
index 804d8a602..2197aa032 100644
--- a/patched-vscode/package.json
+++ b/patched-vscode/package.json
@@ -27,7 +27,7 @@
     "watch-client": "node --max-old-space-size=4095 ./node_modules/gulp/bin/gulp.js watch-client",
     "watch-clientd": "deemon yarn watch-client",
     "kill-watch-clientd": "deemon --kill yarn watch-client",
-    "watch-extensions": "node --max-old-space-size=4095 ./node_modules/gulp/bin/gulp.js watch-extensions watch-extension-media",
+    "watch-extensions": "node --max-old-space-size=8191 ./node_modules/gulp/bin/gulp.js watch-extensions watch-extension-media",
     "watch-extensionsd": "deemon yarn watch-extensions",
     "kill-watch-extensionsd": "deemon --kill yarn watch-extensions",
     "precommit": "node build/hygiene.js",
diff --git a/patches/sagemaker-ui-dark-theme.patch b/patches/sagemaker-ui-dark-theme.patch
new file mode 100644
index 000000000..0792a9ef3
--- /dev/null
+++ b/patches/sagemaker-ui-dark-theme.patch
@@ -0,0 +1,238 @@
+Index: sagemaker-code-editor/vscode/extensions/sagemaker-ui-dark-theme/.vscodeignore
+===================================================================
+--- /dev/null
++++ sagemaker-code-editor/vscode/extensions/sagemaker-ui-dark-theme/.vscodeignore
+@@ -0,0 +1,12 @@
++.vscode/**
++.vscode-test/**
++out/test/**
++out/**
++test/**
++src/**
++tsconfig.json
++out/test/**
++out/**
++cgmanifest.json
++yarn.lock
++preview-src/**
+Index: sagemaker-code-editor/vscode/extensions/sagemaker-ui-dark-theme/README.md
+===================================================================
+--- /dev/null
++++ sagemaker-code-editor/vscode/extensions/sagemaker-ui-dark-theme/README.md
+@@ -0,0 +1 @@
++# SageMaker UI Dark Theme
+Index: sagemaker-code-editor/vscode/extensions/sagemaker-ui-dark-theme/extension-browser.webpack.config.js
+===================================================================
+--- /dev/null
++++ sagemaker-code-editor/vscode/extensions/sagemaker-ui-dark-theme/extension-browser.webpack.config.js
+@@ -0,0 +1,17 @@
++/*---------------------------------------------------------------------------------------------
++ *  Copyright Amazon.com Inc. or its affiliates. All rights reserved.
++ *  Licensed under the MIT License. See License.txt in the project root for license information.
++ *--------------------------------------------------------------------------------------------*/
++
++//@ts-check
++
++'use strict';
++
++const withBrowserDefaults = require('../shared.webpack.config').browser;
++
++module.exports = withBrowserDefaults({
++    context: __dirname,
++    entry: {
++        extension: './src/extension.ts'
++    },
++});
+Index: sagemaker-code-editor/vscode/extensions/sagemaker-ui-dark-theme/extension.webpack.config.js
+===================================================================
+--- /dev/null
++++ sagemaker-code-editor/vscode/extensions/sagemaker-ui-dark-theme/extension.webpack.config.js
+@@ -0,0 +1,20 @@
++/*---------------------------------------------------------------------------------------------
++ *  Copyright Amazon.com Inc. or its affiliates. All rights reserved.
++ *  Licensed under the MIT License. See License.txt in the project root for license information.
++ *--------------------------------------------------------------------------------------------*/
++
++//@ts-check
++
++'use strict';
++
++const withDefaults = require('../shared.webpack.config');
++
++module.exports = withDefaults({
++    context: __dirname,
++    resolve: {
++        mainFields: ['module', 'main']
++    },
++    entry: {
++        extension: './src/extension.ts',
++    }
++});
+Index: sagemaker-code-editor/vscode/extensions/sagemaker-ui-dark-theme/src/extension.ts
+===================================================================
+--- /dev/null
++++ sagemaker-code-editor/vscode/extensions/sagemaker-ui-dark-theme/src/extension.ts
+@@ -0,0 +1,51 @@
++import * as vscode from 'vscode';
++
++const SERVICE_NAME_ENV_KEY = 'SERVICE_NAME';
++const SERVICE_NAME_ENV_VALUE = 'SageMakerUnifiedStudio';
++const DEFAULT_THEME = 'Default Dark Modern';
++
++let outputChannel: vscode.OutputChannel;
++
++export function activate() {
++    // Check if in SageMaker Unified Studio
++    const envValue = process.env[SERVICE_NAME_ENV_KEY];
++    if (!envValue || envValue !== SERVICE_NAME_ENV_VALUE) {
++        return;
++    }
++
++    const config = vscode.workspace.getConfiguration();
++    const themeConfig = config.inspect('workbench.colorTheme');
++    outputChannel = vscode.window.createOutputChannel('SageMaker UI Dark Theme');
++
++    outputChannel.appendLine(`Current theme configuration: ${JSON.stringify(themeConfig, null, 2)}`);
++
++    // Check if theme is only set at default level
++    if (themeConfig?.globalValue === undefined &&
++        themeConfig?.workspaceValue === undefined &&
++        themeConfig?.workspaceFolderValue === undefined) {
++
++        outputChannel.appendLine('Theme only set at default level, applying theme update');
++
++        // Update the configuration
++        Promise.resolve(
++            config.update('workbench.colorTheme', DEFAULT_THEME, vscode.ConfigurationTarget.Global)
++                .then(() => {
++                    outputChannel.appendLine(`Theme configuration updated to ${DEFAULT_THEME}`);
++                    // Reload to apply theme
++                    return vscode.commands.executeCommand('workbench.action.reloadWindow');
++                })
++                .then(() => outputChannel.appendLine('Theme applied successfully'))
++        )
++        .catch((error) => {
++            outputChannel.appendLine(`Failed to apply theme: ${error}`);
++        });
++    } else {
++        outputChannel.appendLine('Theme already configured in user or workspace settings, not overriding');
++    }
++}
++
++export function deactivate() {
++    if (outputChannel) {
++        outputChannel.dispose();
++    }
++}
+Index: sagemaker-code-editor/vscode/extensions/sagemaker-ui-dark-theme/tsconfig.json
+===================================================================
+--- /dev/null
++++ sagemaker-code-editor/vscode/extensions/sagemaker-ui-dark-theme/tsconfig.json
+@@ -0,0 +1,10 @@
++{
++	"extends": "../tsconfig.base.json",
++	"compilerOptions": {
++		"outDir": "./out"
++	},
++	"include": [
++		"src/**/*",
++		"../../src/vscode-dts/vscode.d.ts"
++	]
++}
+Index: sagemaker-code-editor/vscode/extensions/sagemaker-ui-dark-theme/yarn.lock
+===================================================================
+--- /dev/null
++++ sagemaker-code-editor/vscode/extensions/sagemaker-ui-dark-theme/yarn.lock
+@@ -0,0 +1,4 @@
++# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
++# yarn lockfile v1
++
++
+Index: sagemaker-code-editor/vscode/build/gulpfile.extensions.js
+===================================================================
+--- sagemaker-code-editor.orig/vscode/build/gulpfile.extensions.js
++++ sagemaker-code-editor/vscode/build/gulpfile.extensions.js
+@@ -64,6 +64,7 @@ const compilations = [
+ 	'extensions/sagemaker-idle-extension/tsconfig.json',
+ 	'extensions/sagemaker-terminal-crash-mitigation/tsconfig.json',
+ 	'extensions/sagemaker-open-notebook-extension/tsconfig.json',
++	'extensions/sagemaker-ui-dark-theme/tsconfig.json',
+ 	'extensions/tunnel-forwarding/tsconfig.json',
+ 	'extensions/typescript-language-features/test-workspace/tsconfig.json',
+ 	'extensions/typescript-language-features/web/tsconfig.json',
+Index: sagemaker-code-editor/vscode/build/npm/dirs.js
+===================================================================
+--- sagemaker-code-editor.orig/vscode/build/npm/dirs.js
++++ sagemaker-code-editor/vscode/build/npm/dirs.js
+@@ -43,6 +43,7 @@ const dirs = [
+ 	'extensions/sagemaker-idle-extension',
+ 	'extensions/sagemaker-terminal-crash-mitigation',
+ 	'extensions/sagemaker-open-notebook-extension',
++	'extensions/sagemaker-ui-dark-theme',
+ 	'extensions/search-result',
+ 	'extensions/simple-browser',
+ 	'extensions/tunnel-forwarding',
+Index: sagemaker-code-editor/vscode/package.json
+===================================================================
+--- sagemaker-code-editor.orig/vscode/package.json
++++ sagemaker-code-editor/vscode/package.json
+@@ -27,7 +27,7 @@
+     "watch-client": "node --max-old-space-size=4095 ./node_modules/gulp/bin/gulp.js watch-client",
+     "watch-clientd": "deemon yarn watch-client",
+     "kill-watch-clientd": "deemon --kill yarn watch-client",
+-    "watch-extensions": "node --max-old-space-size=4095 ./node_modules/gulp/bin/gulp.js watch-extensions watch-extension-media",
++    "watch-extensions": "node --max-old-space-size=8191 ./node_modules/gulp/bin/gulp.js watch-extensions watch-extension-media",
+     "watch-extensionsd": "deemon yarn watch-extensions",
+     "kill-watch-extensionsd": "deemon --kill yarn watch-extensions",
+     "precommit": "node build/hygiene.js",
+Index: sagemaker-code-editor/vscode/extensions/sagemaker-ui-dark-theme/package.json
+===================================================================
+--- /dev/null
++++ sagemaker-code-editor/vscode/extensions/sagemaker-ui-dark-theme/package.json
+@@ -0,0 +1,46 @@
++{
++  "name": "sagemaker-ui-dark-theme",
++  "displayName": "SageMaker UI Dark Theme",
++  "description": "SageMaker UI Dark Theme",
++  "extensionKind": [
++    "workspace"
++  ],
++  "version": "1.0.0",
++  "publisher": "sagemaker",
++  "license": "MIT",
++  "engines": {
++    "vscode": "^1.70.0"
++  },
++  "main": "./out/extension",
++  "categories": [
++    "Other"
++  ],
++  "activationEvents": [
++    "onStartupFinished"
++  ],
++  "capabilities": {
++    "virtualWorkspaces": true,
++    "untrustedWorkspaces": {
++      "supported": true
++    }
++  },
++  "contributes": {
++    "configuration": {
++      "type": "object",
++      "title": "SageMaker UI Dark Theme",
++      "properties": {}
++    },
++    "commands": [
++    ]
++  },
++  "scripts": {
++    "compile": "gulp compile-extension:sagemaker-ui-dark-theme",
++    "watch": "npm run build-preview && gulp watch-extension:sagemaker-ui-dark-theme",
++    "vscode:prepublish": "npm run build-ext",
++    "build-ext": "node ../../node_modules/gulp/bin/gulp.js --gulpfile ../../build/gulpfile.extensions.js compile-extension:sagemaker-ui-dark-theme ./tsconfig.json"
++  },
++  "dependencies": {
++  },
++  "repository": {
++  }
++}
diff --git a/patches/series b/patches/series
index 7c3c12166..e4cd73f85 100644
--- a/patches/series
+++ b/patches/series
@@ -11,3 +11,4 @@ sagemaker-idle-extension.patch
 terminal-crash-mitigation.patch
 sagemaker-open-notebook-extension.patch
 security.diff
+sagemaker-ui-dark-theme.patch