h1 {
  color: blue;
}

label::after {
  content: " :";
}

.main__section_form {
  display: flex;
  flex-direction: column;

  > * {
    margin-top: 1em;
  }

  label[for="form-field-pseudo"] {
    color: greenyellow
  }

  label[for="form-field-presentation"] {
    color: red;
  }
}