JSFiddle - React, Tailwind, and code Playground

HTML

<body>
  <div id="container">
    <div class="red"></div>
    <div class="blue"></div>
    <div class="green"><img src="http://lorempixel.com/200/300/"></div>
  </div>
</body>

CSS

body {
  margin: 0;
}

div#container {
  display: flex;
  flex-direction: column;
  height: 100vh;
}

div.red {
  height: 100px;
  background-color: red;
  flex: 0 0 auto;
}

div.blue {
  height: 150px;
  background-color: blue;
  flex: 0 0 auto;
}

/* 
div.green {
  background-color: green;
  flex: 0 1 auto;
}

img
{
  max-height: 100%;
}
*/

div.green {
    background-color: green;
    flex: 1 1 auto;
}

img {
    height: calc(100vh - 250px);
}