error[E0599]: no variant named `Hsl` found for type `Color` in the current scope
  --> $DIR/bogus-tag.rs:7:16
   |
LL | enum Color { Rgb(isize, isize, isize), Rgba(isize, isize, isize, isize), }
   | ---------- variant `Hsl` not found here
...
LL |         Color::Hsl(h, s, l) => { println!("hsl"); }
   |         -------^^^--------- variant not found in `Color`

error: aborting due to previous error

For more information about this error, try `rustc --explain E0599`.