body {
  margin: 3em;
  padding: 0;
  font-family: sans-serif;
  font-size: 18px;
  line-height: 1.5;
  text-align: center;
}

h1 {
  line-height: 1.25;
  margin: 1em 0 0;
  text-transform: uppercase;
}

p {
  margin: .5em 0;
}

.picker li {
  list-style: none;
  width: 80px;
  height: 30px;
  margin: 0 15px 15px 0;
  border-radius: 50%;
  border: 3px solid black;
  overflow: hidden;
  display: inline-block;
}

li:hover{
  width: 100px;
  height: 100px;
}

#greyButton {
  background: grey;
}

#orangeButton {
  background: orange;
}

#pinkButton {
  background: pink;
}

#greenButton {
  background: green;
}