style.css

body{
	background-color: #232323;
	margin: 0;
	font-family: "Helvetica";
}

.square{
	width: 30%;		/*to limit the size of each square div as compared to the container div*/
	background: purple;
	padding-bottom: 30%;
	float: left;
	margin: 1.66%;		/*to add margin between the square divs so that they can be distinguished from each other*/
	border-radius: 15%;
	transition: background 0.6s;
	-webkit-transition: background 0.6s;
	-moz-transition: background 0.6s;
}

#container{
	max-width: 600px;		/*to limit the size of the area occupied by the container div*/
	margin: 17px auto;
}

h1{
	text-align: center;
	color: white;
	background-color: steelblue;
	margin: 0;
	font-weight: normal;
	text-transform: uppercase;
	line-height: 1.1;
	padding: 20px 0;
}

.h1text{
	font-size: 35px;
}

#colorDisplay{
	font-size: 180%;
}

#message{
	display: inline-block;
	width: 20%;
}

#stripe{
	background: white;
	height: 25px;
	text-align: center;
}

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

button{
	border : none;
	background : none;
	text-transform: uppercase;
	height: 100%;
	font-weight : 700;
	color: steelblue;
	letter-spacing: 1px;
	font-size: inherit;
	transition: all 0.4s;
	-webkit-transition: all 0.6s;
	-moz-transition: all 0.6s;
	outline: none;
}

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