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

.topology-container {
  color: rgb(var(--tone-gray-700));
}

// Columns/Containers & Lines
#downstream-container,
#metrics-container,
#upstream-container {
  border: 1px solid rgb(var(--tone-gray-200));
  border-radius: var(--decor-radius-100);
}
#downstream-container,
#upstream-container {
  background-color: rgb(var(--tone-gray-100));
}
#downstream-container div:first-child {
  display: inline-flex;
  span::before {
    @extend %with-info-circle-outline-mask, %as-pseudo;
    background-color: rgb(var(--tone-gray-500));
  }
}

// Metrics Container
#metrics-container {
  div:first-child {
    background-color: rgb(var(--white));
  }
  .link {
    background-color: rgb(var(--tone-gray-100));
    a {
      color: rgb(var(--tone-gray-700));
    }
    a::before {
      background-color: rgb(var(--tone-gray-500));
    }
    a:hover {
      color: rgb(var(--color-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: var(--transparent);
  }
  circle {
    fill: rgb(var(--white));
  }
  .allow-arrow {
    fill: rgb(var(--tone-gray-300));
    stroke-linejoin: round;
  }
  path,
  .allow-dot,
  .allow-arrow {
    stroke: rgb(var(--tone-gray-300));
    stroke-width: 2;
  }
  path[data-permission='not-defined'] {
    stroke-dasharray: 4;
  }
  path[data-permission='deny'] {
    stroke: rgb(var(--tone-red-500));
  }
  .deny-dot {
    stroke: rgb(var(--tone-red-500));
    stroke-width: 2;
  }
  .deny-arrow {
    fill: rgb(var(--tone-red-500));
    stroke: rgb(var(--tone-red-500));
    stroke-linejoin: round;
  }
}