what diffrences does these settings in myproject/asset/app.styl?

[anlexN]

1.

$theme := {
  primary:     $red.darken-2
  accent:      $red.accent-2
  secondary:   $grey.lighten-1
  info:        $blue.lighten-1
  warning:     $amber.darken-2
  error:       $red.accent-4
  success:     $green.lighten-2
}

@require '~vuetify/src/stylus/main'

2.

{{#alacarte}}
@require '~vuetify/src/stylus/app.styl'
{{else}}
@require '~vuetify/src/stylus/main.styl'
{{/alacarte}}

.page
  @extend .fade-transition

3.

$color-pack = false

@import '~vuetify/src/stylus/main'

by the way, whether does app.styl set $color-pack = false defaultly?