Visual Studios Code Configuration

Hi everyone, I have a question about Visual Studios Code, specifically in how it handles css. How do I add an item to the syntax colour formatting, the case at hand is `transition-property: top, opacity;`. “top” is correctly formatted blue but opacity is “black”.

I would also like to change the autocomplete feature to add a space after the colon when selecting a property from the dropdown list. any help would be apreciated.