We have the top section PAGE HEADER that contains the website heading and the navbar. Just before the green comment for that section, we have an opening DIV tag to start the section.
Now go to your myStyles.css file.
Save your CSS file and take a look at your page. If you like the color, continue; otherwise try different colors until you find one you like for your page heading.
Don't worry about the text color, if it's hard to read; we'll change that in a bit.
Now do the same for the other DIV.
On the home page, it will look nicer to have everything including the pictures inside one box, so select the green comments with the closing and opening DIV for the PAGE CONTENT... and delete. There should only be one DIV starting before the page header and closing at the bottom.
So now you'll see the pictures inside the same box as the page heading.
Go into body style and add a new line (indented) and add...
This sets the color for the content/text on your topic pages (H2, lists, paragraphs).