diff --git a/src/main/java/net/thauvin/erik/mobibot/Utils.java b/src/main/java/net/thauvin/erik/mobibot/Utils.java
index 4c7d8d5..648ad7d 100644
--- a/src/main/java/net/thauvin/erik/mobibot/Utils.java
+++ b/src/main/java/net/thauvin/erik/mobibot/Utils.java
@@ -159,10 +159,13 @@ public final class Utils {
      * @param color The color.
      * @return The colorized string.
      */
-    public static String colorize(final String s, final String color) {
-        if (color.equals(Colors.BOLD) || color.equals(Colors.REVERSE)) {
+    static String colorize(final String s, final String color) {
+        if (!Utils.isValidString(color) || color.equals(Colors.NORMAL)) {
+            return s;
+        } else if (color.equals(Colors.BOLD) || color.equals(Colors.REVERSE)) {
             return color + s + color;
         }
+
         return color + s + Colors.NORMAL;
     }