main.css

body{
    background-color: #232323;
    font-family: Arial, Helvetica, sans-serif
}

.square{
    width:30%;
    padding-bottom: 30%;
    float:left;
    margin:1%;
    border-radius: 5%;
    /* border: 3px solid white; */
    transition: background 0.4s;
    -webkit-transition: background 0.4s;
}

#container{
    max-width: 800px;
    margin:40px auto;
}
h1{
    color: white;
    text-align: center;
    margin: 0px;
    padding:10px;
    background-color: steelblue;
    padding:20px 0;
}
#message{
    font-weight: 800;
    color:steelblue;
    margin: 0 auto;
    display: inline-block;
    width: 20%;
}

.bar{
height: 40px;
background:white;
text-align: center;
}
.selected{
    background-color: steelblue;
    color: white;
}
#colorDisplay{
    font-size: 200%;
    text-transform: uppercase;
}

button{
    font-weight: 700;
    border:none;
    background: none;
    text-transform: uppercase;
    height: 100%;
    font-size: inherit;
    color:steelblue;
    font-family: inherit;
    transition:all 0.5s ease;
    margin: 0px 0px;
    outline: none;
}
button:hover{
    color:white;
    background: steelblue;
}