I like Suru yellow behind the logo, but it helps to have a fold to lighten the top right corner so the tail doesn’t melt into it:
EDIT: This might look a bit more balanced if the fold cuts the squircle in half:
EDIT #2: You know what, lol… I rejected white at the start because it made the scaled logo look ugly (pixellated) around the edges. But when I revisit it now with the newly scaled logo, I think it’s definitely an option:
In fact, if someone held a gun to my head and said I had to choose one tonight, I’d say white.