38th step what funtion

couldnt guess the code, like what funtion??? please help

Describe your issue in detail here.

  **Your code so far**
/* file: index.html */
<!DOCTYPE html>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Colored Markers</title>
  <link rel="stylesheet" type="text/css" href="styles.css">
  <h1>CSS Color Markers</h1>
  <div class="container">
    <div class="marker one">
    <div class="marker two">
    <div class="marker three">
/* file: styles.css */
h1 {
text-align: center;
background-color: rgb(0, 255, 255);

.container {
background-color: rgb(255, 255, 255);
padding: 10px 0;

.marker {
width: 200px;
height: 25px;
margin: 10px auto;

.one {
background-color: rgb(0, 0, 0);

.two background-color rgb(255, 0, 0)

.three {
background-color: rgb(0, 0, 0);

  **Your browser information:**

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/101.0.4951.64 Safari/537.36 Edg/101.0.1210.53

Challenge: Step 38

Link to the challenge:

Does this syntax match the other two similar rules?