<div class="wrap">
  <div class="item"></div>
  <div class="item two"></div>
</div>

.item {
  display: inline-block;
  width: 100px;
  height: 100px;
  border-style: solid;
  border-width: 40px;
  border-color: #f6666f #0aaaa0 yellow #aa00ff;
}
.two {
  margin-left: 50px;
  border-right: none;
}

.wrap {
  display: flex;
  justify-content: center;
  margin: 40px auto 0;
}