Design Tokens

Design tokens are the named, reusable values that store a design's basic decisions, such as a specific brand blue or a standard spacing size, in one central place. Instead of typing the same colour code across hundreds of screens, each one refers to the token, so the value lives in a single spot.

It is like a master list of paint colours by name: change what the name points to and every wall using it updates at once. Design tokens matter because they let a business adjust its look, or offer a dark mode, by changing values in one place rather than hunting through everything.