Can somebody help me with reproduction this painting https://i.stack.imgur.com/84y4I.jpg in browser, with HTML tag and CSS
Yesterday I was seeking help with this task, and one kind gentleman [ user:215552 ] helped me (thank you very much sir!)
But there is still an issue with HTML validator 
I tried to fix it in different ways, but finished not knowing how to add cells to this without breaking the whole painting :c
The HTML code (previously edited by the User Heretic Monkey):
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<link rel="stylesheet" href="../css/style.css">
</head>
<body>
<table id="table2">
<colgroup>
<col class="w69">
<col class="w65">
<col class="w65">
<col class="w71">
<col class="w71">
<col class="w76">
<col class="w76">
<col class="w52">
</colgroup>
<tr class="md">
<td class="br bb" colspan="3"> </td>
<td class="br bb bl" colspan="2"> </td>
<td class="br bb bl yellow" colspan="2"> </td>
<td class="bb bl"> </td>
</tr>
<tr class="lg">
<td class="bt br bb"> </td>
<td class="bt br bb bl red" colspan="4" rowspan="2"></td>
<td class="bt br bb bl yellow" colspan="2"> </td>
<td></td>
</tr>
<tr class="lg">
<td class="bt br bb" rowspan="2"> </td>
<td class="bt br bb bl"> </td>
<td class="bt br bb bl"> </td>
<td></td>
</tr>
<tr class="sm">
<td class="bt bb bb bl black" colspan="2" rowspan="2"></td>
<td class="bt bb bl"> </td>
<td class="bt bb"> </td>
<td class="bt bb bl"> </td>
<td class="bt br bb"> </td>
<td></td>
</tr>
<tr class="sm">
<td class="bt br yellow" rowspan="2"></td>
<td class="bt bl"> </td>
<td class="bt br"> </td>
<td class="bt br bl blue" colspan="2" rowspan="2"></td>
<td class="bt bl red" rowspan="2"></td>
</tr>
<tr class="sm">
<td class="bt br bl" colspan="2"></td>
<td class="bt bl black"> </td>
<td class="bt br bl black"> </td>
</tr>
</table>
</body>
</html>
The CSS code (previously edited by the User Heretic Monkey):
* {
box-sizing: border-box;
background-color: floralwhite;
}
img {
border: 0px solid transparent;
width: 404px;
height: 404px;
}
body {
width: 100%;
background-color: floralwhite;
display: flex;
justify-content: space-evenly;
}
table {
empty-cells: show;
background-color: #fefefe;
border: 0px solid transparent;
width: 389px;
height: 389px;
margin: 6px;
border-collapse: collapse;
}
thead { display: none }
tr {
border: 0px none transparent;
}
td {
border: 0px none transparent;
}
.bl {
border-left: var(--border-width, 4px) solid black;
}
.bt {
border-top: var(--border-width, 4px) solid black;
}
.br {
border-right: var(--border-width, 4px) solid black;
}
.bb {
border-bottom: var(--border-width, 4px) solid black;
}
.red {
background-color: #da422a;
}
.yellow {
background-color: #f8ce2e;
}
.black {
background-color: black;
}
.blue {
background-color: #3c5f99;
}
.sm {
height: 40px;
}
.md {
height: 58px;
}
.lg {
height: 75px;
}
.w69{
width: 69px;
}
.w65{
width: 65px;
}
.w71{
width: 71px;
}
.w76{
width: 76px;
}
.w52{
width: 52px;
}