The region between different design elements is referred to as "negative” or “white” space. This is part of the design that doesn’t contain anything. No images, drawings, shiny colours or text. Nothing.
The name is kind of misleading — it’s not a "negative" thing and it doesn’t have to be "white". It can be any colour: white space refers to what you don’t add; the empty parts around and within your design.
It’s one of the fundamental building blocks of design and is just as important as any elements you do include. Think of it like a diet: what you eat matters, but what you don’t eat matters just as much.
“White Space in design composition is the same as the use of silence in a musical composition. Without proportionate use of silence, music is unstructured. Similarly, without white space, design is unstructured and difficult to consume." — Mark den Hartog
There are two types of white space: micro and macro. Micro white space is the space between small elements (like text), while macro white space refers to the area between large elements or surrounding a design.