diff --git a/src/org/mozilla/javascript/NativeConsole.java b/src/org/mozilla/javascript/NativeConsole.java
index b4ef8e125f..2cf4a2712c 100644
--- a/src/org/mozilla/javascript/NativeConsole.java
+++ b/src/org/mozilla/javascript/NativeConsole.java
@@ -21,7 +21,7 @@ public class NativeConsole extends IdScriptableObject {
 
     private static final String DEFAULT_LABEL = "default";
 
-    private static final Pattern FMT_REG = Pattern.compile("%[sfdioO%]");
+    private static final Pattern FMT_REG = Pattern.compile("%[sfdioOc%]");
 
     private final Map<String, Long> timers = new ConcurrentHashMap<>();
 
@@ -249,6 +249,9 @@ public static String format(Context cx, Scriptable scope, Object[] args) {
                             replaceArg = formatObj(cx, scope, val);
                             break;
 
+                            // %c is not supported,
+                            // simply removed from the output
+
                         default:
                             replaceArg = "";
                             break;
diff --git a/testsrc/org/mozilla/javascript/tests/NativeConsoleTest.java b/testsrc/org/mozilla/javascript/tests/NativeConsoleTest.java
index 7c0d8141ee..db6060a494 100644
--- a/testsrc/org/mozilla/javascript/tests/NativeConsoleTest.java
+++ b/testsrc/org/mozilla/javascript/tests/NativeConsoleTest.java
@@ -253,6 +253,18 @@ public void formatObject() {
         }
     }
 
+    @Test
+    public void formatStyling() {
+        assertFormat(new Object[] {"%c", "color: orange"}, "");
+        assertFormat(new Object[] {"12%c34", "color: orange"}, "1234");
+        assertFormat(new Object[] {"%c", "color: orange", "color: blue"}, "color: blue");
+
+        // %c counts
+        assertFormat(new Object[] {"12%c34%s", "color: orange", "ab"}, "1234ab");
+
+        assertFormat(new Object[] {"%c"}, "%c");
+    }
+
     @Test
     public void formatValueOnly() {
         try (Context cx = Context.enter()) {