body {

padding-top: 40px;

}

rainbow {

margin-bottom: 20px;

}

.rainbow-color {

width: 100%;
height: 2px;
opacity: 0.6;

}

.red { background-color: ff0000; } .orange { background-color: ff8000; } .yellow { background-color: ffff00; } .green { background-color: #008000; } .blue { background-color: #0000ff; } .indigo { background-color: #4b0082; } .violet { background-color: #9400d3; }