hellosmithy

// background transparency
background-transparency(color, alpha = 1)
  ms-color = argb(color, alpha)
  background rgb(color)
  background rgba(color, alpha)
  .lt-ie8 &
    zoom 1
  .lt-ie9 &
    background transparent
    filter s('progid:DXImageTransform.Microsoft.gradient(startColorstr=%s,endColorstr=%s)', ms-color, ms-color)