<div class="a inverted"></div>
<div class="b inverted"></div>
<div class="b"></div>
<div class="a"></div>
<style>
body {
background: #F2F2B6;
margin: 0;
display: flex;
align-items: center;
justify-content: center;
}
div {
border-right: 75px solid transparent;
border-left: 75px solid transparent;
display: inline-block;
}
.a {
border-bottom: calc(75px * 0.866 * 2) solid #FD4602;
margin: 0 -160px;
}
.b {
border-bottom: calc(75px * 0.866 * 2) solid #FF6D00;
margin: 0 -10px;
}
.inverted {
transform: rotatez(0.5turn);
}
</style>