Change the opacity over the 'sold out' item

I have tried everything that I can think of/find on this forum to edit the opacity of the white overlaying the ‘sold out’ product image on the collection page. I’ve attached a screenshot for reference. I have the shopify theme, Streamline. I’ve had a very difficult time editing Streamline since many parts of the code are titled differently than other shopify themes.

nevermind, figured it out!