How to add black bar in the mainpage´ mainmenu?

Hello,
We can see a black background in the menu of internal pages. We would like that appear too in the
main page menu. Can you help me please?

I added this to your custom.css file

.t3-header {
  background-color:#171717!important;
}
.ja-topbar {
  background-color:#252525!important;
}

Now the black bar is also in home page

Regards