Here are some common background-color codes that you can use in your CSS:

• #ffffff - white
• #000000 - black
• #f2f2f2 - light gray
• #cccccc - gray
• #e6e6e6 - dark gray
• #ff0000 - red
• #00ff00 - green
• #0000ff - blue
• #ffff00 - yellow
• #ffa500 - orange
• #800080 - purple

You can also use color names instead of codes, such as "white", "black", "gray", "red", "green", "blue", "yellow", "orange", and "purple".

Hello World!

This page has a light blue background color!