body {
    margin: 0;
    font-family: sans-serif;
    background-color: #dddddd;
}

.box {
    height: 100px;
    width: 100px;
}

.box1 {
    background: pink;
}

.box2 {
    background: red;
}

.box3 {
    background: firebrick;
}

.box4 {
    background: orange;
}

.box5 {
    background: yellow;
}

.box6 {
    background: greenyellow;
}

.box7 {
    background: green;
}

.box8 {
    background: blue;
}

.box9 {
    background: blueviolet;
}

.box10 {
    background: violet;
}