How to achieve this visual using CSS

Question

I need to create the above visual using only css and only one div having 300px height and width. I tried gradient but could not get anything same. Anyone can help pleas

Answer 1

You can try having a few divs and then have it encapsulated inside one div. Check out my code on JSfiddle.

.main {
  width: 300px;
  height: 300px;
}
.first {
  width: 300px;
  height: 150px;
}
.blue {
  width:150px;
  height: 150px;
  position: relative;
  float: left;
  background-color: blue;
}
.yellow {
  width:150px;
  height: 150px;
  position: relative;
  float: right;
  background-color: yellow;
}
.green {
  width: 300px;
  height: 150px;
  background-color: green;
  border-radius: 0 0 500px 500px;
}

.red {
  position: relative;
  height: 150px;
  top: -400px;
  border-left: 150px solid transparent;
  border-right: 150px solid transparent;
  border-bottom: 150px solid red;
}