Diagonal Side div color css js

Question

i have 2 div like this

Answer 1

You can use clip paths and 2 div within a container,

https://codepen.io/anon/pen/OOXPmv

HTML

CSS

body, html {
  margin: 0;
  padding: 0;
  height: 100%;
  width: 100%;
  background: #ccc;
}

#wrapper {
  width: 100%;
  height: 100%;
  background: #111;
}

#left {
  position: absolute;
  top: 0;
  left: 0;
  width: 101%; /* If you make it 100%, you get a bit of black showing along the diagonal */
  height: 100%;
  background: #99b4d3;
  -webkit-clip-path: polygon(0 0, 76% 0, 24% 100%, 0% 100%);
  clip-path: polygon(0 0, 76% 0, 24% 100%, 0% 100%);
}

#right {
  position: absolute;
  top: 0;
  right: 0;
  width: 100%;
  height: 100%;
  background: #d9b596;
  -webkit-clip-path: polygon(76% 0, 100% 0, 100% 100%, 24% 100%);
  clip-path: polygon(76% 0, 100% 0, 100% 100%, 24% 100%);
}