You may have noticed that the default AutoCAD background is an off-white shade. In a comment, Tim asked if this is the same as the Block Editor background. No, not quite. This image shows the different backgrounds and some linework, with black as a comparison:
Paper space is pure white (Red, Green, Blue is 255,255,255), Model space is very pale cream (254,252,240) and the Block Editor is a slightly darker cream (255,252,229). In common with most people in my experience (and most people who need to use drawings with yellow linework), my backgrounds are all going to be 0,0,0 (black). I don’t want to make a big fuss about this, because it’s very easy to change, but I find it kind of funny how this has flip-flopped over the years. There’s a poll about this to the right if you haven’t already seen it.