=fancy-gradient($color1, $color2)
  $top_shine: lighten($color1, 18)
  $bottom_glow: lighten($color2, 10)
  $top_middle: $color1
  $middle: lighten($color2, 3)
  $bottom_middle: $color2
  +linear-gradient(color_stops($top_shine, $top_middle 10%, $middle 50%, $bottom_middle 50%, $bottom_glow))

=invert-fancy-gradient($color1, $color2)
  $top: lighten($color2, 6)
  $bottom: lighten($color2, 14)
  $top_middle: lighten($color2, 8)
  $middle: lighten($color2, 4)
  $bottom_middle: lighten($color2, 1)
  +linear-gradient(color_stops($top, $top_middle 30%, $middle 50%, $bottom_middle 50%, $bottom))

=fancy-matte-gradient($color1, $color2)
  +linear-gradient(color_stops($color1, $color2))

=invert-fancy-matte-gradient($color1, $color2)
  $top: lighten($color2, 5)
  $bottom: lighten($color2, 15)
  $middle: lighten($color2, 8)
  +linear-gradient(color_stops($top, $middle 40%, $middle 85%, $bottom))

/* incase an inverted custom gradient isn't specified
=invert-custom-fancy-gradient($color1, $color2)
  +custom-fancy-gradient($color1, $color2)