I'm not sure I understand what the OP means. If you are referring to making a web page that is completely black with the exception of a Google search bar in the middle of it, then you are wasting your time and money. It will not get popular. People use Google, not other Google-based clones.
If what you meant was to replace the search function on your site with the Google search function, than that would probably also be a bad idea because instead of taking users to the page of your site, searched keywords will take them to a Google page containing a link towards your page, so it would involve extra-clicking.