diff --git a/lib/colors.js b/lib/colors.js
index 0b97172..db4d851 100644
--- a/lib/colors.js
+++ b/lib/colors.js
@@ -105,7 +105,7 @@ function applyStyle() {
   var args = Array.prototype.slice.call(arguments);
 
   var str = args.map(function(arg) {
-    return typeof arg === 'object' ? util.inspect(arg) : arg;
+    return arg.constructor === String ? arg : util.inspect(arg);
   }).join(' ');
 
   if (!colors.enabled || !str) {