When you turn down the brightness on a light theme, you're also turning down all contrast just because the background is emitting too much light. A dark theme

When you turn down the brightness on a light theme, you're also turning down all contrast just because the background is emitting too much light. A dark theme has the simple solution of turning off the "lightbulb" of a white background. Now the only light is produced by they actual content, so the contrast can remain high. Though, I also am annoyed that I can't turn down the brightness on my macbook/iphone even more (e.g. in a pitch black room). That is one thing that has indeed forced me to use a dark theme when I wouldn't necessarily have thought of it.