Reversed type is used to describe light text on a dark background, also referred to as "knocked out" type.
There are a few things to be cautious of when using reversed text in your design:
When reversed type gets printed, the ink has a tendency to spread into the type (making fine details smaller)
If the typeface you want to use is available in different weights, choosing a heavy or bold variant is a good idea
The text should be large enough to be easily read
It is not recommended to be used for large amounts of body text; it is harder and more tiring for the eyes to read