XD :How to import/copy the Colors document assets from one file to another file in XD?

I created a project Library with colors, character styles & components.

I have given specific names with variables to all the colors used in the library, which is very useful for the work of the dev team, who directly define colors in this way. When they then work on a specific screen in the project prototype, they see the name of the variable used for a component and easily navigate.
But this only happens in the library itself, and I would like to be able to import the colors directly from the library and into the project prototype file so that this functionality is available here as well.

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