Change the background colour of YouTube Video embed

Question

I was wondering if there's any way to change the background-colour of the YouTube screen which appears when the embedded video is initially loading (image attached below)? Currently, it has a black background colour which I wanted to change to white; I tried adding theme=light to the URL but that didn't help. I also searched for this option inside the YouTube Embedded Players and Player Parameters document but couldn't find anything related to this. This is how my video embed code looks like:

<iframe width="770" height="434" src="//www.youtube.com/embed/(video code)?theme=light&modestbranding=1&autohide=1&showinfo=0&controls=0&rel=0&vq=hd1080" frameborder="0" allowfullscreen></iframe>

Answer 1

Google YouTube themes have been deprecated:

This parameter indicates whether the embedded player will display player controls (like a play button or volume control) within a dark or light control bar. This parameter has been deprecated for HTML5 players, which always use the dark theme.