<!DOCTYPE html>
<html>

    <body>
        <style>
        .grid-container {
            display: inline-grid;
            grid-template-columns: auto auto auto;
            background-color: #2196F3;
            padding: 10px;
        }
        
        .grid-item {
            background-color: rgba(241, 37, 37, 0.8);
            border: 1px solid rgba(0, 0, 0, 0.8);
            padding: 20px;
            font-size: 30px;
            text-align: center;
        }
            
        </style>

        <div class="grid-container">
            <div class="grid-item">1</div>
            <div class="grid-item">2</div>
            <div class="grid-item">3</div>  
            <div class="grid-item">4</div>
            <div class="grid-item">5</div>
            <div class="grid-item">6</div>  
            <div class="grid-item">7</div>
            <div class="grid-item">8</div>
            <div class="grid-item">9</div>  
        </div>
    </body>

</html>