What is the most important tool for adding colors to certain areas of the page rather than the entire background ?

Answer 1

There isn't a certain tool. Using CSS, you can add colors for specific elements :D

For example:

div {
background-color: blue;
}

Answer 2

Cover that area in div tag (using proper height and width)
And then add background to it.

Answer 3

Can anyone answer me more efficiently.....🥺🥺