diff --git a/test/semantic/README.md b/test/semantic/README.md
new file mode 100644
index 0000000..6b5e6cd
--- /dev/null
+++ b/test/semantic/README.md
@@ -0,0 +1 @@
+# Test files for Sematic highlighting
\ No newline at end of file
diff --git a/test/semantic/test.js b/test/semantic/test.js
new file mode 100644
index 0000000..1737849
--- /dev/null
+++ b/test/semantic/test.js
@@ -0,0 +1,16 @@
+function test(param1) {
+    const unused_variable = "test"
+    const readonly_variable = "test"
+    let variable = "test"
+
+    console.log(param1)             // Function parameter
+    console.log(readonly_variable)  // Readonly variable (constant)
+    console.log(variable)           // Writable variable
+}
+
+class Test {
+    constructor() {
+        // nut
+        this._nut = "butter"
+    }
+}
\ No newline at end of file
diff --git a/themes/ecksClone-pastel-dark-color-theme.json b/themes/ecksClone-pastel-dark-color-theme.json
index 6639458..94c0559 100644
--- a/themes/ecksClone-pastel-dark-color-theme.json
+++ b/themes/ecksClone-pastel-dark-color-theme.json
@@ -4,6 +4,12 @@
 	"include": "./_dark_ui.json",
 	"colors": {
 	},
+	"semanticTokenColors": {
+		"parameter": "#d18b2f",
+		"variable": "#F07178",
+		"property": "#FFFFFF"
+	},
+	"semanticHighlighting": true,
 	"tokenColors": [
 		{
 			"name": "Comment",