I'm using the new checkout extensibility admin API, specifically the checkoutBrandingUpsert GraphQL mutation in the Admin API. I'm seeing this style --x-default-color-background-subdued: var(--swn0jdn, var(--swn0j15)); (currently var(--swn0jdn) which...

Hello, I hope you've had some luck with this. I'm having the same issue, were you able to modify that color through the admin API or otherwise?