consul/ui/packages/consul-ui/app/components/topology-metrics/skin.scss

.topology-notices {
  button {
    @extend %button;
    color: var(--token-color-foreground-action);
  }
  button::before {
    @extend %as-pseudo;
    @extend %with-chevron-down-mask;
  }
  button[aria-expanded='true']::before {
    @extend %with-chevron-up-mask;
  }
}
.topology-container {
  color: var(--token-color-foreground-faint);
}

// Columns/Containers & Lines
#downstream-container,
#metrics-container,
#upstream-container {
  border-radius: var(--decor-radius-100);
  border: 1px solid;
  /* TODO: If this color is combined with the above */
  /* border property then the compressor removes the color */
  border-color: var(--token-color-surface-interactive-active);
}
#downstream-container,
#upstream-container {
  background-color: var(--token-color-surface-strong);
}
#downstream-container > div:first-child {
  display: inline-flex;
  span::before {
    @extend %with-info-circle-outline-mask, %as-pseudo;
    background-color: var(--token-color-foreground-faint);
  }
}

// Metrics Container
#metrics-container {
  div:first-child {
    background-color: var(--token-color-surface-primary);
  }
  .link {
    background-color: var(--token-color-surface-strong);
    a {
      color: var(--token-color-foreground-faint);
    }
    a::before {
      background-color: var(--token-color-foreground-faint);
    }
    a:hover {
      color: var(--token-color-foreground-action);
    }
    .metrics-link::before {
      @extend %with-exit-mask, %as-pseudo;
    }
    .config-link::before {
      @extend %with-docs-mask, %as-pseudo;
    }
  }
}

// SVG Line styling
#downstream-lines svg,
#upstream-lines svg {
  path {
    fill: transparent;
  }
  circle {
    fill: var(--token-color-surface-primary);
  }
  .allow-arrow {
    fill: var(--token-color-palette-neutral-300);
    stroke-linejoin: round;
  }
  path,
  .allow-dot,
  .allow-arrow {
    stroke: var(--token-color-palette-neutral-300);
    stroke-width: 2;
  }
  path[data-permission='not-defined'],
  path[data-permission='empty'] {
    stroke-dasharray: 4;
  }
  path[data-permission='deny'] {
    stroke: var(--token-color-foreground-critical);
  }
  .deny-dot {
    stroke: var(--token-color-foreground-critical);
    stroke-width: 2;
  }
  .deny-arrow {
    fill: var(--token-color-foreground-critical);
    stroke: var(--token-color-foreground-critical);
    stroke-linejoin: round;
  }
}