Color Change attribute for embed code not working

[syd097]

I am trying to embed a spotify playlist onto my squarespace site and make it white instead of black. I followed the exact procedure from Spotify's released directions however I keep getting an error message. Here is the code I am using. What is wrong?

<iframe src="https://open.spotify.com/embed/user/cts3714/playlist/4sYTPQ7c9egWjWUgvjseRO&theme=white" width="800" height="880" frameborder="0" allowtransparency="true”></iframe>