tabler/scss/layout/_dark.scss

// stylelint-disable declaration-no-important

body {
  &:not(.theme-dark):not([data-bs-theme=dark]) {
    .hide-theme-light {
      display: none !important;
    }

    .img-dark {
      display: none !important;
    }
  }

  &.theme-dark,
  &[data-bs-theme=dark] {
    .hide-theme-dark {
      display: none !important;
    }

    .img-light {
      display: none !important;
    }
  }
}

@if $enable-dark-mode {
  @include color-mode(dark, true) {
    --#{$prefix}body-color: #{$body-color-dark};
    --#{$prefix}body-color-rgb: #{to-rgb($body-color-dark)};
    --#{$prefix}muted: #{$text-secondary-dark};

    --#{$prefix}body-bg: #{$darken-dark};
    --#{$prefix}body-bg-rgb: #{to-rgb($darken-dark)};
    --#{$prefix}emphasis-color: #{$body-emphasis-color-dark};
    --#{$prefix}emphasis-color-rgb: #{to-rgb($body-emphasis-color-dark)};

    --#{$prefix}bg-forms: #{$darken-dark};
    --#{$prefix}bg-surface: #{$dark};
    --#{$prefix}bg-surface-dark: #{$darken-dark};
    --#{$prefix}bg-surface-secondary: #{$lighten-dark};
    --#{$prefix}bg-surface-tertiary: #{$darken-dark};

    --#{$prefix}link-color: #{lighten($primary, 8%)};
    --#{$prefix}link-hover-color: #{$primary};

    --#{$prefix}active-bg: #{$lighten-dark};
    --#{$prefix}disabled-color: var(--#{$prefix}gray-700);

    --#{$prefix}border-color: var(--#{$prefix}dark-mode-border-color);
    --#{$prefix}border-color-translucent: var(
      --#{$prefix}dark-mode-border-color-translucent
    );
    --#{$prefix}border-dark-color: var(--#{$prefix}dark-mode-border-dark-color);
    --#{$prefix}border-active-color: var(
      --#{$prefix}dark-mode-border-active-color
    );

    --#{$prefix}btn-color: #{$darken-dark};

    --#{$prefix}code-color: var(--#{$prefix}body-color);
    --#{$prefix}code-bg: #{$border-dark-color-dark};

    @each $color, $value in $theme-colors {
      --#{$prefix}#{$color}-lt: #{theme-color-lighter($value, $dark)};
      --#{$prefix}#{$color}-lt-rgb: #{to-rgb(
          theme-color-lighter($value, $dark)
        )};
    }

    .navbar-brand-autodark {
      .navbar-brand-image {
        @include autodark-image;
      }
    }
  }

  body[data-bs-theme=dark] [data-bs-theme=light] {
    @extend [data-bs-theme=dark];
  }
}