Step 49:Learn Css colours

what goes wrong here
i write it as per instruction but it doesn’t work

.red {

background:rgb(255,0,0);

}

this is error message

Test

Sorry, your code does not pass. You’re getting there.

Hint

Your .red CSS rule should have a background property with the value rgb(255, 0, 0).

   **Your code so far**
/* file: index.html */
<!DOCTYPE html>
<html>
 <head>
   <meta charset="utf-8">
   <meta name="viewport" content="width=device-width, initial-scale=1.0">
   <title>Colored Markers</title>
   <link rel="stylesheet" href="styles.css">
 </head>
 <body>
   <h1>CSS Color Markers</h1>
   <div class="container">
     <div class="marker red">
     </div>
     <div class="marker green">
     </div>
     <div class="marker blue">
     </div>
   </div>
 </body>
</html>
/* file: styles.css */
h1 {
 text-align: center;
}

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

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

.red {
background:rgb(255,0,0);
}

.green {
 background-color: #007F00;
}

.blue {
 background-color: hsl(240, 100%, 50%);
}

   **Your browser information:**

User Agent is: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/15.5 Safari/605.1.15

Challenge: Step 49

Link to the challenge: