oficinasuport-wp-theme/sass/plugins/contactform7/_contactform7.scss

.wpcf7-not-valid:not(:focus) {
  background-color: $color__red;
}
.wpcf7-not-valid-tip {
  color: $color__red;
}
.wpcf7 form.invalid .wpcf7-response-output,
.wpcf7 form.unaccepted .wpcf7-response-output,
.wpcf7 form.payment-required .wpcf7-response-output {
  border-color: $color__yellow;
  background-color: $color__yellow;
  color: $color__white;
  font-family: "din-medium";
  font-weight: bold;
  text-align: center;
  margin: 0em;
  padding: 0rem;
}
.wpcf7-form {
  .wpcf7-submit {
    margin-left: 1rem;
  }
  .wpcf7-spinner {
    margin: 0 -24px 0 0;
  }
}