.renkli ul {
  list-style: none;
}

.renkli  ul li::before {
  content: "\2022";
  color: red;
  font-weight: bold;
  display: inline-block;
  width: 1em;
  margin-left: -1em;
}

<div class="renkli">
<ul>
<li>Adele</li>
<li>Agnes</li>
<li>Billy</li>
<li>Bob</li>
</ul>
</div>