How do you change e-commerce variant out of stock styling?

I can’t find this anywhere, I want to change the out of stock variant styling for the button style (M & XL in this example). See image below. Does anybody know where this can be changed?

Many thanks


Here is my site Read-Only: https://preview.webflow.com/preview/goldhouse?utm_medium=preview_link&utm_source=dashboard&utm_content=goldhouse&preview=2e10f70e9215f2e8901b7c435eec7e87&workflow=preview (It’s on the page called “store”)