tiny id/class name

by Roberto Apasajja

HTML

<div class="a">
  dddd
</div>

<div class="b">
  dddd
</div>

<div class="A">
  dddd
</div>

<br>

<div id="a">
  dddd
</div>

<div id="b">
  dddd
</div>

<div id="A">
  dddd
</div>

CSS

.a{
  background:pink
}
.b{
  background:teal
}
.A{
  background:blue
}

#a{
  background:green
}
#b{
  background:yellow
}
#A{
  background:purple
}