colorGame.css

body{
    background-color: #232323;
}

h1{
    text-align: center;
    background-color: steelblue;
    color: white;
    text-transform: uppercase;
    font-weight: normal;
    padding: 10px 0;
    margin: 0
}

.container{
    margin: 10px auto;
    max-width: 600px;
}

.square{
    width: 30%;
    background-color: purple;
    margin: 1.33%;
    height: 170px;
    float: left;
    border-radius: 15%;
    transition: background-color 0.7s;
}

#messageDisplay{
    display: inline-block;
    width: 300px;
}

.nav{
    background-color: white;
    text-align: center;
    height: 30px;
}

button{
    font-weight: bold;
    border: 0;
    background: none;
    height: 100%;
    color: steelblue;
    outline: 0;
    transition: all 0.3s;
    text-transform: uppercase;
}

button:hover{
    background-color: steelblue;
    color: white;
}

.selected{
    color: white;
    background-color: steelblue;
}