CSS: Background split in 4
4 boje za background
HTML
<div class="test"></div>
CSS
.test{
width: 100%;
height: 100vh;
background: linear-gradient(to right, #FFF 0%, #FFF 50%, #008DD2 50%, #008DD2 100%), linear-gradient(to right, #F2651C 0%, #F2651C 50%, #BCC375 50%, #BCC375 100%);
background-size: 100% 50%;
background-position: center top, center bottom;
background-repeat: no-repeat;
}