Is there a way of making a single button transparent (almost)?

Hi

I would like to add a button to the main image on my landing page, but would like this particular button to be almost transparent.

Is there a way of doing this, i.e manipulating the opacity of 'secondary button' etc.

Please see image, though the actual website does not contain the button as of yet.

Thanks

Yes, you can do this with some Custom CSS that specifies the unique ID of the block or the section. What is the URL of the page with the button?

Thanks,  www.brainforestcreative.com