Bootstrap 5 How to change the blue color border to a different color from dropdown menu when you click on "Dropdown" - drop-down-menu

Question

I am using Bootstrap 5. I am trying to change the blue color border to a different color from dropdown menu when you click on "Dropdown" I tried to change it in the css, but it is not overriding the blue border. I would appreciate any suggestions.
picture of dropdown blue border
Here is a link: https://www.codeply.com/p/PI41011ti0
<nav class="navbar navbar-expand navbar-dark bg-dark d-none d-md-flex" aria-label="navigation bar">
<div class="container-fluid">
<ul class="navbar-nav">
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" href="#" id="navbarDropdownMenuLink" role="button" data-bs-toggle="dropdown" aria-expanded="false">
Dropdown</a>
<ul class="dropdown-menu" aria-labelledby="navbarDropdownMenuLink">
<li><a class="dropdown-item" href="#">Link 1</a></li>
<li><a class="dropdown-item" href="#">Link 2</a></li>
</ul>
</li>
</ul>
</div>
</nav>

Answer 1

Here, It is outline of element when click on. You can hide or change color with below css for that.
For Change Outline Color:
.nav-link:focus {
outline-color: #ffffff;
outline-style: solid;
}
For Hide Outline:
.nav-link:focus {
outline: 0;
}
You can refer for more details here: https://www.w3schools.com/cssref/pr_outline-color.asp