.blue{
    background-color: blue;
}
.black{
    background-color: black;
}
.color{
    border: 1px solid black;
    display: inline-block;
    height: 50px;
    width: 50px;
}
.cyan{
    background-color: cyan;
}
.pixel{
    border: 1px solid black;
    background-color: white;
    display: inline-block;
    height: 40px;
    width: 40px;
}
#pixel-board div{
    display: flex;
}
.red{
    background-color: red;
}