diff --git a/README.md b/README.md
index 862217fd..5b4ab78a 100644
--- a/README.md
+++ b/README.md
@@ -40,3 +40,5 @@ http://codemetropolis.github.io/CodeMetropolis/
 1. navigate to `sources` folder
 1. `mvn clean package`
 1. The current distribution will be aviable under `source/distro`.
+
+## Demo
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diff --git a/sources/gui/src/main/java/codemetropolis/toolchain/gui/CodeMetropolisGUI.java b/sources/gui/src/main/java/codemetropolis/toolchain/gui/CodeMetropolisGUI.java
index 7ef2ae8a..9996dea5 100644
--- a/sources/gui/src/main/java/codemetropolis/toolchain/gui/CodeMetropolisGUI.java
+++ b/sources/gui/src/main/java/codemetropolis/toolchain/gui/CodeMetropolisGUI.java
@@ -6,6 +6,8 @@
 import java.awt.Image;
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
+import java.awt.event.FocusEvent;
+import java.awt.event.FocusListener;
 import java.io.File;
 import java.io.PipedOutputStream;
 import java.util.Random;
@@ -46,6 +48,8 @@ public class CodeMetropolisGUI extends JFrame {
   private static final FileFilter XML_FILTER = new XmlFileFilter();
   private static final int COVER_IMAGE_COUNT = 4;
   private static final Random rng = new Random();
+  private static final Color colorGreen = Color.decode(Translations.t("color_green"));
+  private static final Color colorRed = Color.decode(Translations.t("color_red"));
 
   private GUIController controller;
 
@@ -57,6 +61,8 @@ public class CodeMetropolisGUI extends JFrame {
   private CMCheckBox validateStructure;
   private CMSpinner scaleSpinner;
   private CMComboBox<LayoutAlgorithm> layoutSelector;
+  private FocusListener highlighter;
+  private CMLabel projectNameErrorMessage;
 
   /**
    * Instantiates the CodeMetropolis GUI.
@@ -79,6 +85,56 @@ public CodeMetropolisGUI(GUIController controller) {
 
     initFields();
 
+    projectNameErrorMessage = new CMLabel("", 205, 365, 300, 30);
+    highlighter = new FocusListener() {
+      /***
+       * When the focus gained, this method checks the rules of the project name and shows if there are any problems.
+       *
+       * @param e The FocusEvent to modify the background of the textfield
+       */
+      @Override
+      public void focusGained(FocusEvent e) {
+        ExecutionOptions executionOptions = controller.getExecutionOptions();
+        fillOptions(executionOptions);
+
+        if (executionOptions.getProjectName().isEmpty()) {
+          e.getComponent().setBackground(Color.WHITE);
+          projectNameErrorMessage.setText("");
+        } else if (executionOptions.getProjectName().length() < 3) {
+          e.getComponent().setBackground(colorRed);
+          projectNameErrorMessage.setText("Project name must be at least three characters");
+        } else {
+          e.getComponent().setBackground(colorGreen);
+          projectNameErrorMessage.setText("");
+        }
+      }
+
+      /***
+       * When the focus gained, this method checks the rules of the project name and shows if there are any problems.
+       *
+       * @param e The FocusEvent to modify the background of the textfield
+       */
+      @Override
+      public void focusLost(FocusEvent e) {
+        ExecutionOptions executionOptions = controller.getExecutionOptions();
+        fillOptions(executionOptions);
+
+        if (executionOptions.getProjectName().isEmpty()) {
+          e.getComponent().setBackground(Color.WHITE);
+          projectNameErrorMessage.setText("");
+        } else if (executionOptions.getProjectName().length() < 3) {
+          e.getComponent().setBackground(colorRed);
+          projectNameErrorMessage.setText("Project name must be at least three characters");
+        } else {
+          e.getComponent().setBackground(colorGreen);
+          projectNameErrorMessage.setText("");
+        }
+      }
+    };
+
+    projectName.addFocusListener(highlighter);
+    panel.add(projectNameErrorMessage);
+
     this.setResizable(false);
     this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
     this.setContentPane(panel);
diff --git a/sources/gui/src/main/resources/translations.properties b/sources/gui/src/main/resources/translations.properties
index f56865a2..e17de867 100644
--- a/sources/gui/src/main/resources/translations.properties
+++ b/sources/gui/src/main/resources/translations.properties
@@ -61,3 +61,7 @@ gui_err_sm_run_failed = Failed to run SourceMeter!
 gui_err_unexpected_err = Unexpected error occured!
 gui_err_unhandled_metric_source = Unhandled metric source!
 gui_err_world_gen_failed = World generation failed! Check logs for details!
+
+#Colors
+color_green = 0xA5FFB4
+color_red = 0xFF9C9C
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