iframe - flashing gray

I am using: w2.css

I have the following:
<div class=“w3-third w3-white”>
<h3>2nd Content Area</h3>
<h4>Blah, bla, blah…
<iframe src=“http://website.com/SiteDir/ApplDir/NoticeItems/index.php” backgroundColor=w3-white height=“400” width=“420” frameBorder=“0” allowtransparency=“true”></iframe>
</h4>
</div>

= = = = = = = =
WHen running the page, the backgound of the site is white, but the application flashes gray when loading the application then shows white. If the application open anothe application (link) the screen flashes gray again then goes to white.

How can I stop this?? transparency does not seem to work, it seems like it is in the SC application process.

Thanks

SC support provided the answer!

In the event onScriptInit the following was added [it sets the background of the application to be TRANSPARENT avoiding the gray flash!! ]

?>
<style>
#TB_overlay{
background-color: rgba(0, 0, 0, 0);
}
</style>
<?php

:slight_smile: