<div class="wrapper">
  <p>Lorem ipsum, dolor sit amet consectetur adipisicing elit. Ratione eos et quod consectetur veniam omnis sapiente alias totam vel, nam id laudantium optio itaque magnam qui repellat quia expedita doloribus!</p>
</div>

body {
  margin: 0;
  box-sizing: border-box;
}
.wrapper {
  background: #000;
  min-height: 100vh;
}
p {
  filter: invert(100%);
  margin: 0;
  font-size: 24px;
  padding: 25px;
}