I'm checking out the customizer for the first time, creating my own page. I typically use SDP in Night Mode. When I use an HTML snippet and preview it, the preview has the HTML snippet with a dark background (good) and still black text (bad). I did not specify colors for either thing, though I think the background color for the snippet may have defaulted to black.

Ideally this should abide by the user's Night Mode setting I think.