How do you change the background colour on web language

Question

Please

Answer 1

For coloring the entire page you can put in your code :

<style>
body {
background-color:blue;
}
</style>

Answer 2

I am not clear with your questions

But if this helps

https://code.sololearn.com/WMnuFHusL12k/?ref=app

Answer 3

Use the CSS background-color property.
Read the lesson for more info
https://www.sololearn.com/learn/CSS/1103/

Answer 4

/*in CSS*/

.your_div{
background-color: red;
}

/*in HTML*/

<div style="background-color: red;"></div>