hey I wondered the same thing and asked a similar question here the other day: Sneak peek: Tokens + multidimensional themes - #3 by Louis
Color tokens and color assets are separate, and you have to decide which one to use.
From my understanding, using color assets are still an interesting option if you don’t really need to deal with tokens as they’re easier to set on the go, but if you’re needing to create for example color schemes, then tokens are the way to go.
