Design tokens essentially store design decisions — like colour, size, and space — which can be systematically applied throughout a product.
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Architecting Tokens (thread)
Using Code as a Design tool Checklist
Update the library, style guide(s), or whatever design file(s) the team uses to share design assets.
Make sure the update is effectively tracked and queued for a developer to update the code, (for example, by creating a Github Issue).
Update any documentation.
Inform the team about the change. Ideally, they should be aware of the change before it’s been made. If I include them in the process of figuring out why the change is needed and what the change should be, you will avoid any conflicts or repetition of work.