bgcolor is the background color. Look up hex codes on the net and find the color you want the background to be and enter the hex code using # plus the 6 numbers that code for the color you want.
You should now have something that looks like this:
Be sure that all your html is closed; That is to say at the bottom of the page there should be :
> with body after the slash and before >
To add html open to close But remember when using html the first that you open is the last you close. Look at the top of your html page. The first you see is and the last at the very bottom is
Write down the code you start with, or copy paste and print. Then edit, SAVE and do a visual editor to see how it looks. If you don't like it replace the html you changed with what was there initially.
Sorry but my examples are not allowed in a post. I hope there is enough info to help.