div.row div {
    border: 1px solid #888;
}

.bg-color1{
    background-color: hsl(200, 10%, 100%);
}

.bg-color2{
    background-color: hsl(200, 20%, 90%);
}

.bg-color3{
    background-color: hsl(200, 40%, 80%);
}

.bg-color4a{
    background-color: hsl(200, 60%, 70%);
}

.bg-color4b{
    background-color: hsl(200, 60%, 50%);
    color: hsl(200, 60%, 90%);
}

.bg-color5{
    background-color: hsl(200, 80%, 60%);
}

.bg-color6{
    background-color: hsl(200, 90%, 50%);
}

.bg-color7{
    background-color: hsl(200, 100%, 40%);
    color: whitesmoke;
}