diff --git a/browser.js b/browser.js
index 7c764522..a0757bbc 100644
--- a/browser.js
+++ b/browser.js
@@ -39,9 +39,9 @@ exports.colors = [
 
 function useColors() {
   // is webkit? http://stackoverflow.com/a/16459606/376773
-  return ('WebkitAppearance' in document.documentElement.style) ||
+  return (typeof document !== 'undefined' && 'WebkitAppearance' in document.documentElement.style) ||
     // is firebug? http://stackoverflow.com/a/398120/376773
-    (window.console && (console.firebug || (console.exception && console.table))) ||
+    (typeof window !== 'undefined' && window.console && (console.firebug || (console.exception && console.table))) ||
     // is firefox >= v31?
     // https://developer.mozilla.org/en-US/docs/Tools/Web_Console#Styling_messages
     (navigator.userAgent.toLowerCase().match(/firefox\/(\d+)/) && parseInt(RegExp.$1, 10) >= 31);