How to use a black background?

Sometimes you need to adjust your presentation for dimmed environments etc. In this case, use the bg-color option and adjust the title color to a lighter color. Youll probably also want to adjust the text color.

Note that you can use any of the typst color functions, eg. a RGB code.

#show: slides.with(
  ...
  title-color: white, // color for elements like headings 
  bg-color: black, // background color
  ...
)

#set text(fill:white) // text color

The output will look like this: