diff --git a/atom/browser/api/atom_api_web_contents.cc b/atom/browser/api/atom_api_web_contents.cc
index 4bc6c081023..7df905a8ee9 100644
--- a/atom/browser/api/atom_api_web_contents.cc
+++ b/atom/browser/api/atom_api_web_contents.cc
@@ -770,7 +770,7 @@ void WebContents::DidChangeThemeColor(SkColor theme_color) {
   if (theme_color != SK_ColorTRANSPARENT) {
     Emit("did-change-theme-color", atom::ToRGBHex(theme_color));
   } else {
-    Emit("did-change-theme-color", atom::ToRGBHex(SK_ColorTRANSPARENT));
+    Emit("did-change-theme-color", nullptr);
   }
 }