MINI

files >> C:/xampp/phpMyAdmin/templates/error/generic.twig
 <!DOCTYPE HTML>
<html lang="{{ lang }}" dir="{{ dir }}">
<head>
    <link rel="icon" href="favicon.ico" type="image/x-icon">
    <link rel="shortcut icon" href="favicon.ico" type="image/x-icon">
    <title>phpMyAdmin</title>
    <meta charset="utf-8">
    <style type="text/css">
        html {
            padding: 0;
            margin: 0;
        }
        body  {
            font-family: sans-serif;
            font-size: small;
            color: #000000;
            background-color: #F5F5F5;
            margin: 1em;
        }
        h1 {
            margin: 0;
            padding: 0.3em;
            font-size: 1.4em;
            font-weight: bold;
            color: #ffffff;
            background-color: #ff0000;
        }
        p {
            margin: 0;
            padding: 0.5em;
            border: 0.1em solid red;
            background-color: #ffeeee;
        }
    </style>
</head>
<body>
<h1>phpMyAdmin - {{ error_header }}</h1>
<p>{{ error_message|raw }}</p>
</body>
</html>