tabler/scss/ui/_buttons-extra.scss

@if $enable-ghost-buttons {
  @each $vendor, $color in $theme-colors {
    .btn-ghost-#{$vendor} {
      @include button-variant(transparent, transparent, $color, $color, $color, #fff, $color, $color);
    }
  }
}

@if $enable-social-colors {
  @each $vendor, $color in $social-colors {
    .btn-#{$vendor} {
      @include button-variant($color, $color);
    }

    .btn-outline-#{$vendor} {
      @include button-outline-variant($color, $color);
    }
  }
}

@if $enable-extra-colors {
  @each $name, $color in $colors {
    .btn-#{$name} {
      @include button-variant($color, $color);
    }

    .btn-outline-#{$name} {
      @include button-outline-variant($color, $color);
    }
  }
}