@import url(https://fonts.googleapis.com/css?family=Roboto:700);
body{
  background-color: rgb(0,0,0);
  text-align: center;
  padding: 40px 0 0 0; 
}
fieldset{
  border: none;
}
output{
  display: inline-block;
  min-width: 2.5em;
}
label, output{
  padding: 2px 9px;
  border-radius: 3px;
  font-family: 'Roboto', sans-serif;
  color: #000;
  font-size: 1.1em;
}
label[for=r], output[for=r]{
  background-color: #f00;
}
label[for=g], output[for=g]{
  background-color: #0f0;
}
label[for=b], output[for=b]{
  background-color: #00f;
}
#hex{
  min-width: 4.5em;
  font-size: 3em;
  background: rgba(255,255,255,.3);
}