For lack of a better term, I've been calling it "dark cookbook aesthetic," because it was very common in cookbooks from the late 1970s to the mid-1990s. It was also common in textbooks and other instructional literature with photographic illustration. A lot of early Sesame Street clips also used this aesthetic a lot.
It's a very clean, minimal aesthetic of bright colorful things against a plain black background. For example, a recipe in a cookbook might have a photograph of all the fresh ingredients arranged in a visually pleasing manner against a black background. Or the back cover of the book might have a grid of colorful food photos against a black background. Or a photograph of a colorfully-laid table, but nothing beyond the table - just black.
It has a futuristic feel, even in a 40-year old book.
There are more modern examples, in which the plain black background has been replaced with very dark wood or stone.
