You might say naming the color is enough, but in reality, a color picker is the more natural way to interact.
As humans, we don’t communicate only through words. Other forms of interaction matter too.
It will probably have access to a list of components with their specifications, especially the type of data that the components allow to mutably (or not) represent.
Or respond to a query from a database by presenting a graph automatically.
But the hard part is to turn natural language into a sql query in my opinion. It's not really the choice of data representation which is heavily informed by the data itself (type and value) and doesn't require much inference.