Hello again!

Loving the extension, just had a few concerns. My site has a darker color to it, and anywhere an album is displayed, it has a white background. Is this a simple change? If so, where would I change this? My other concern, my site is also a responsive site, so it leaves a big gap on the album pic when fully expanded, showing the white background again. Is it possible to set the maximum size for the image in an expanded window? Sorry if this is a confusing question, I've added a SS to show what I mean. It shows the white I'd like to change as well. Thank you for the support!