html {
    height: 100%;
}

body {
    height: 100%;
    margin: 0;
    font-family: Arial, sans-serif;
}

.content-wrapper {
    display: flex;
    position:absolute;
    width: 100%;
    height: 100%;
    color: #ffffff;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.color-wrapper {
    display: flex;
    height: 100%;
}

.heading {
    padding: 15px;
    background-color: #000000;
    display: inline-block;
    text-transform: uppercase;
}

.color {
    width: calc(100% / 8);
    height: 100%;
}

.white {
    background-color: #ffffff;
}

.yellow {
    background-color: #f9fb00;
}

.cyan {
    background-color: #02feff;
}

.green {
    background-color: #01ff00;
}

.pink {
    background-color: #fd00fb;
}

.red {
    background-color: #fb0102;
}

.blue {
    background-color: #0301fc;
}

.black {
    background-color: #000000;
}

.button{
    display: inline-block;
    position: relative;
    padding: 0.5em 1.4em;
    text-decoration: none;
    font-size: 24px;
    margin-top:50px;
    background: #668ad8;/*Button Color*/
    color: #FFF;
    border-bottom: solid 5px #36528c;/*daker than background*/
    border-right: solid 5px #5375bd;/*darker than background*/
}

.button:before{    
    content: " ";
    position: absolute;
    bottom: -5px;
    left: -1px;
    width: 0;
    height: 0;
}

.button:after{   
    content: " ";
    position: absolute;
    top: -1px;
    right: -5px;
    width: 0;
    height: 0;
}