<div class="w3tr">
  <div class="renk1">W3TR</div>
  <div class="renk2">W3TR</div>
  <div class="renk3">W3TR</div>
</div>
.w3tr{
  display:flex;
  height: 200px;
}
.renk1{background: #00FFFF;}
.renk2{background: #DC143C; flex-basis: auto; -webkit-flex-basis: auto;}
.renk3{background: #6495ED;}

External CSS

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External JavaScript

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