For multiple color stops in a linear gradient, you can try to run the following code:
Example
<!DOCTYPE html>
<html>
<head>
<style>
#demo {
height: 100px;
background: linear-gradient(blue, orange, yellow, gray);
}
</style>
</head>
<body>
<h2>Linear Gradient</h2>
<div id = "demo">Mutiple Color Stops</div><br>
</body>
</html>