.has-opacity-0
  opacity: 0

.has-opacity-30
  opacity: 0.3

.has-opacity-40
  opacity: 0.4

.has-opacity-50
  opacity: 0.5

.has-opacity-60
  opacity: 0.6

.has-opacity-80
  opacity: 0.8

.has-opacity-1,
.has-opacity-100
  opacity: 1