Navbar toggle button color change from black

When I collapse my nav bar toggle button the border of the toggle button stays black. Any suggestions on changing CSS so border color will come out as white?

I just got this from a 2 minute google search, but should work.

.navbar-default .navbar-toggle.collapsed {
  border-color: white;
}

.navbar-default .navbar-toggle{
 border-color: white;
}

Still not working. I googled and tried different code all day.

Can you post a link to your project so we can help you out?