I was wondering if it would be possible to use vertex-paint over a transparent material?

I have tried plugging in different sockets into the `Mix Shader` node but, have not gotten the result that I was hoping for.
How do I make sure my vertex-paint is not see through when I overlay it on a *Transparent Shader*?

[![enter image description here][1]][1]


  [1]: https://i.sstatic.net/BOyj3Szu.png