+ 1
Hey bro if you want to color the whole page just write this in you style tag :
body{
background-color: red;
}
This make the whole page background red
But if you want make a certain tag u can just use a class :
.DivColorChange{
background-color: red;
}
<body>
<div class="DivColorChange">
</div>
</body>
This will change this div only