Tutorial: Change Lightbox along with Photo Details, Share and Cart Boxes Background Colors
I tried #2 here https://dgrin.com/discussion/265352/customizing-the-new-lightbox/p1but it still shows a lot of "holes" (default theme color), including the other features (photo details, share, cart etc). So, I spent some time customizing my light theme to display a darker background in the Lightbox and support boxes/windows.
Images in the Backcountry
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