純粋なhtml + cssで五輪を実現するサンプルコード

 <div class="container">
    <div class="ring blue"></div>
    <div class="ring yellow yellow1"></div>
    <div class="ring yellow yellow2"></div>
</div>

.ring {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    position: absolute;
    border-style: solid;
    border-width: 10px;
}

.blue {
    border-color: #0180C3;
    top: 0;
    left: 0;
    z-index: 0;
}

.yellow {
    border-color: #FEB131;
    left: 70px;
    top: 60px;
}

.yellow1 {
    /* above the blue ring */
    z-index: 1;
    /* cut circle */
    clip-path: polygon(0 0, 100% 100%, 0 100%);
}


.yellow2 {
    /* below the blue ring */
    z-index: -1;
    clip-path: polygon(0 0, 100% 100%, 100% 0);
}