Black border around splash logo in slideshow

Since the global slideshow issues seemed to have resolved, this problem must have to do with my slideshow in particular. Here's my splash logo, how to remove the black border that appears around it?

Here's the link to the logo copied out of my slideshow code:

Here's the link to the logo copied out of my slideshow code:
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Sorry I meant to post this in the customization forum, I'll repost there.