<!DOCTYPE html>
<html>
<head>
<title>Titre du document</title>
<style>
.example {
width: 400px;
height: 300px;
background: url("/uploads/media/default/0001/01/4982c4f43023330a662b9baed5a407e391ae6161.jpeg"), #fff;
background-size: cover;
}
.example:hover {
background-blend-mode: luminosity;
}
</style>
</head>
<body>
<h2>Convertir une image en niveau de gris en utilisant HTML/CSS</h2>
<div class="example"></div>
</body>
</html>