bootstrap 4 navbar-toggler-icon code example
Example 1: bootstrap navbar toggler icon color
.custom-toggler .navbar-toggler-icon {
background-image: url("data:image/svg+xml;charset=utf8,%3Csvg viewBox='0 0 32 32' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath stroke='rgba(255,102,203, 0.5)' stroke-width='2' stroke-linecap='round' stroke-miterlimit='10' d='M4 8h24M4 16h24M4 24h24'/%3E%3C/svg%3E");
}
.custom-toggler.navbar-toggler {
border-color: rgb(255,102,203);
}
Example 2: navbar bootstrap 4
<nav class="navbar navbar-light bg-light">
<a class="navbar-brand" href="#">
<img src="/docs/4.0/assets/brand/bootstrap-solid.svg" width="30" height="30" alt="">
</a>
</nav>