Styling the iFrame
An iFrame accepts CSS styles such as border, background, etc.
Note the style declaration below:
<iframe frameborder="0" width="any_width" height="any_height"
style="background:#E6E6FA;border:3px solid #FF9900;"
name="any_name"
src="http://mojomaps.com/iframe.php?key=your_publisher's_key">
</iframe>