metamask-extension/ui/components/app/network-display/index.scss

.network-display {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  padding: 0 10px;
  border-radius: 4px;
  min-height: 25px;
  cursor: pointer;
  user-select: none;

  &--disabled {
    cursor: not-allowed;
  }

  &--colored {
    background-color: lighten(rgb(125, 128, 130), 45%);
  }

  &--mainnet {
    background-color: lighten($blue-lagoon, 68%);
  }

  &--ropsten {
    background-color: lighten($crimson, 45%);
  }

  &--kovan {
    background-color: lighten($purple, 65%);
  }

  &--rinkeby {
    background-color: lighten($tulip-tree, 35%);
  }

  &--goerli {
    background-color: lighten($dodger-blue, 35%);
  }


  & .chip__label {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  & .chip__left-icon {
    margin-left: 4px;
  }

  & .chip__right-icon {
    margin-right: 4px;
  }

  &__icon {
    height: 8px;
    width: 12px;
    display: block;
  }
}