height = 5

.block-tab
  font-size: 28px
  background: #79c5f6
  height: 50px
  width: 30px
  text-align: center
  line-height: @height
  color: white
  box-shadow: inset 0 0 3px @background - 40%
  border-radius: left 5px
  margin-top: 400px - (@height / 2)