metamask-extension/ui/components/app/advanced-gas-controls/index.scss

.advanced-gas-controls {
  &__row {
    margin-bottom: 20px;
  }

  &__row-heading {
    display: flex;
  }

  .info-tooltip {
    display: inline-block;
  }

  &__row-heading-detail {
    flex-grow: 1;
    align-self: center;
  }

  &__row-error,
  &__row--error h6 {
    color: $error-1 !important;
    padding-top: 6px;
  }

  h6 {
    padding-bottom: 6px;
    margin-inline-end: 6px;
  }

  i {
    color: #dadada;
    font-size: $font-size-h7;
  }
}