Embed background color

Hi - the iframe code that is generated when you want to share a view makes it look like the background can be changed, but it is always grey regardless of what I do with the iframe code. Has anyone been able to change the background color? Thanks.

<iframe class="airtable-embed" src="https://airtable.com/embed/shdfgsfgs0I?**backgroundColor=blue**" frameborder="0" onmousewheel="" width="100%" height="533" style="border: 1px solid #ccc;"></iframe>

Any updates on this?

Same problem. Need to change background color on embedded views

Same problem. I would like to know more about what is happening in the code.