How to add custom button hover effect on website header button?

As you can see on my website, the current header button "Create Account" does not have any hover effect.

I already have some custom code for this button in CSS (for sizing and colour), and I would like to add a slight dim to it when the mouse hovers on it. However, I want to do this without affecting current button CSS which maintains its size and colour.

Can you please help?

Thank you!

Can you share your website URL?

20 hours ago, Ziggy said:

Can you share your website URL?

Yes, sorry, I thought I did.

www.howtousepsychedelics.com

17 hours ago, Ziggy said:

You can try this CSS:

.header-actions .btn:hover {
    transition:ease-in-out 300ms;
    background-color:rgba(255,255,255,0.85) !important
  }

Thanks, this is working except for the fact that it's slightly transparent on hover?

17 hours ago, Ziggy said:

You can try this CSS:

.header-actions .btn:hover {
    transition:ease-in-out 300ms;
    background-color:rgba(255,255,255,0.85) !important
  }

Solved, actually. Thanks!