How to add a value to an existing column list

Hi everybody,

On a board, we have a column with 3 values for example red; green and blue.
Users can only select one value.

Now we want to add a new value “pink” to our list value using the playground .

Is there a simple way to add this new value and not update an item with this new value with create_labels_if_missing option !?

And how to delete a value from a column list ? For example i do not want blue value anymore.

Thank you