Rockie

Revoking my question! I was able to hack this together from pieces of code others had so kindly provided on other questions. Feel free to delete this entirely if needed, I'll provide the code below just in case anyone is looking for similar help. (in custom CSS - make sure to add the "important;" - my trouble was not having that included!)
 
.product-mark.sold-out {
  color: #000!important;
  background: #fff!important;
  font-family: "covik-sans"!important;
  text-transform: uppercase!important;
  font-weight: 900!important;
  font-size: 25px!important;
  letter-spacing: 0.8px!important;
}

Thanks to all who are so helpful on here!