<===> input.sass
::selection
  color: rebeccapurple
::-webkit-selection
  color: rebeccapurple
::-webkit-selection, ::selection
  color: rebeccapurple
\:-webkit-selection
  color: rebeccapurple

\:hover TD
  color: red
\:color red
  foo: bar
\:nth-child(2n+1) SPAN
  foo: bar

<===> output.css
::selection {
  color: rebeccapurple;
}

::-webkit-selection {
  color: rebeccapurple;
}

::-webkit-selection, ::selection {
  color: rebeccapurple;
}

:-webkit-selection {
  color: rebeccapurple;
}

:hover TD {
  color: red;
}

:color red {
  foo: bar;
}

:nth-child(2n+1) SPAN {
  foo: bar;
}