page id for home page

I have read through all the support threads on this issue. I know how to find a page id when it’s a number.

I need to select the page title only for my homepage to style it, which would usually be something like:
.page-id-# .entry-title, .page-title {
propert: value;
}

But, my homepage permalink is the site url. So, how do I specify its id in the CSS selector?

stclairantiquemall.com