JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.0/css/bootstrap.min.css">
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css">
<div class="bg-custom-gray-dark">
  <div class="container py-5">
    <div class="row">
      <div class="col">
        <ul class="list-group">
          <li class="list-group-item bg-custom-light2 py-4">
            <div class="row align-items-center">
              <form class="col-5">
                <div class="form-group">
                  <div class="input-group">
                    <div class="input-group-prepend">
                      <span class="input-group-text search-icon"><i class="fa fa-search"></i></span>
                    </div>
                    <input type="text" class="form-control search-input p-0" id="exampleInputEmail1"
                           aria-describedby="emailHelp" placeholder="Search...">
                  </div>
                </div>
              </form>

              <div class="col-7 text-right">
                <div class="dropdown filters mr-3">
                  <a class="dropdown-toggle" id="dropdownMenuButton" data-toggle="dropdown"
                     aria-haspopup="true" aria-expanded="false">
                    Filter 1 <i class="fa fa-angle-down"></i>
                  </a>
                  <div class="dropdown-menu" aria-labelledby="dropdownMenuButton">
                    <a class="dropdown-item" href="#">Action</a>
                  </div>
                </div>
                <div class="dropdown filters">
                  <a class="dropdown-toggle" id="dropdownMenuButton" data-toggle="dropdown"
                     aria-haspopup="true" aria-expanded="false">
                    Filter 2 <i class="fa fa-angle-down"></i>
                  </a>
                  <div class="dropdown-menu" aria-labelledby="dropdownMenuButton">
                    <a class="dropdown-item" href="#">Action</a>
   ...

CSS

.form-group {
  margin-bottom: 0 !important;
}

.input-group-text {
  color: #a9b3bb;
}

.input-group-text:hover {
  color: #7b8b8e;
}

.filters {
  display: inline-block;
  color: #7b8b8e;
  font-weight: bold;
}

.filters i{
  font-size: 1.1rem;
  color: #a9b3bb;
  font-weight: bold;
}


.search-icon {
  background-color: #ffffff !important;
  border: 2px solid #e8ebed !important;
  border-right: 1px solid transparent !important;
}

.search-input {
  border-left: 1px solid transparent !important;
  border: 2px solid #e8ebed;
  color: #a9b3bb;
}

.search-icon:hover{
  border-left: 1px solid transparent !important;
  border: 2px solid #a9b3bb;

}
.search-input:hover{
  border: 2px solid #a9b3bb;
}

.dropdown-toggle::after {
  display: none;
}