laravel/resources/assets/sass/app.scss

// Fonts
@import url("https://fonts.googleapis.com/css?family=Raleway:300,400,600");

// Variables
@import "variables";

// Bootstrap
@import '~bootstrap/scss/bootstrap';

.navbar-laravel{
  background-color: #fff;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.04);
}