horizon/openstack_dashboard/static/dashboard/scss/components/_network_topology_svg.scss

#topology_canvas {
  font-family: sans-serif;

  .network-rect {
     cursor: pointer;

    &.nourl {
      cursor: auto;
    }
  }

  .network-name {
     font-weight: $badge-font-weight;
     font-size: $font-size-base;
     fill: $component-active-color;
     text-anchor: middle;
   }

  .network-cidr {
     font-size: $font-size-small;
     text-anchor: end;
   }

  text.network-type {
     font-family: FontAwesome;
     text-anchor: end;
   }

  .port_text {
     font-size: $font-size-small;
     fill: $gray;

    &.left {
      text-anchor: end;
    }
   }

  .base_bg_normal {
     fill: $gray-dark;
   }

  .loading_bg_normal {
     fill: $gray;
   }

  .base_bg_small,
  .loading_bg_small {
     fill: $body-bg;
   }

  .active {
     fill: $brand-success;
   }

  .icon polygon {
     fill: $gray-dark;
   }

  .instance_small,
  .router_small {
    .frame {
       fill: url(#device_small_bg);
       stroke: $gray-dark;
       stroke-width: 3;
     }

    .port_text {
       display: none;
    }
  }

  .router_normal,
  .instance_normal {
    .frame {
       fill: #fff;
       stroke: $gray-dark;
       stroke-width: 4;
     }

    .icon_bg {
       fill: #fff;
       stroke: $gray-dark;
       stroke-width: 4;
     }

    .texts_bg {
       fill: url('#device_normal_bg');
     }

    .texts {
      .name {
         text-anchor: middle;
         fill: $gray-dark;
         font-size: $font-size-base;
       }

      .type {
         text-anchor: middle;
         fill: #fff;
         font-size: $font-size-base;
      }
    }

    .instance_bg {
       fill: $gray-dark;
    }
  }

  g.loading {
    .active {
      fill: $gray;
     }

    .icon polygon {
      fill: $gray;
     }

    .instance_bg {
      fill: $gray;
     }

    .instance_small,
    .router_small {
      .frame {
        stroke: $gray;
        fill: url(#device_small_bg_loading);
      }
    }

    .instance_normal {
      .frame {
        stroke: $gray;
      }

      .name {
        fill: $gray-light;
      }

      .texts_bg {
        fill: url(#device_normal_bg_loading);
      }

      .icon_bg {
        stroke: $gray;
      }
    }
  }
}