Why are card layouts with dark background not frequent?

1. Is a dark background less effective?
2. Should a background be light or dark?
3. Why are black backgrounds good?
4. Is white text on black background easier to read?

Is a dark background less effective?

The researchers put this down to the fact that when we look at a bright background, our pupils constrict and increase acuity while scanning text. When looking at a black background, the opposite effect occurs, and dilated pupils make it harder to focus on the text.

Should a background be light or dark?

However, if we have to choose one, I would say that a dark background is a safer choice. The main reason behind is that a dark background is more comfortable for the audience. Light backgrounds – especially white – release a fair amount of light that can be uncomfortable for the eyes.

Why are black backgrounds good?

Black backgrounds are effective, and powerful. Black absorbs all light, so it's a low-energy color. It helps to give a lot of “white space” without a blinding glare on large screens. This is especially important in large public presentations using 300' screens.

Is white text on black background easier to read?

It'll reflect less light, making it easier to read. Keep in mind that if you're reading text in a dark room where no light is present, white text on a black background isn't as hard to read. This is because no light is reflecting off it in a dark room.