Пример решения:
body {
  background:#d6d4d4;
  }
article>p:first-child {
  color:#047d18;
  }
article>p:nth-child(2) {
  color:#0f24db;
}
article>div {
  background:#fff;
  color: red;
  text-align: center;
}
article>p:nth-child(4) {
  color:#f8fc00;
}
article>p:nth-child(5) {
  color: #047d18;
}
article>p:nth-child(6) {
  color: #047d18;
}
.hidden {
  display: none;
}
article>p:nth-child(7) {
  color: #047d18;
}
article>p:nth-child(8) {
  color: #047d18;
}
article>p:nth-child(9) {
  color: #da0afa;
}
article>p:nth-child(10) {
  color: #fa0ac6;
}