:memo: One-character typo change

docs/api/browser-window.md

@@ -200,7 +200,7 @@ It creates a new `BrowserWindow` with native properties as set by the `options`.
     key is pressed. Default is `false`.
   * `enableLargerThanScreen` Boolean (optional) - Enable the window to be resized larger
     than screen. Default is `false`.
-  * `backgroundColor` String (optional) - Window's background color as Hexadecimal value,
+  * `backgroundColor` String (optional) - Window's background color as hexadecimal value,
     like `#66CD00` or `#FFF` or `#80FFFFFF` (alpha is supported). Default is
     `#FFF` (white).
   * `hasShadow` Boolean (optional) - Whether window should have a shadow. This is only