SOURCE

<main class="clearfix">
    <div class="wrapper">
        <section class="center">center</section>
    </div>
    <section class="left">left</section>
    <section class="right">right</section>
</main>

.cearfix::after {
    display: block;
    clear: both;
    content: "";
}
.left,
.right,
.wrapper {
    float: left;
    width: 200px;
    font-weight: 700;
    line-height: 100px;
    text-align: center;
    text-transform: uppercase;
    color: #fff;
    background-color: #066;
}

.wrapper {
    width: 100%;
    background-color: #099;
}

.center {
    margin: 0 200px;
}

.left {
    margin-left: -100%;
}

.right {
    margin-left: -200px;
}