The homepage widget displays a block at the top of the homepage and is a useful place to introduce you and your business:
To add this widget to your own site go to Appearance > Widgets. Look for the Homepage Top widget area and add a header, text widget, list or whatever.
If you want a background image go to the Customizer and open the Homepage Settings section. Scroll down and you will see the Homepage Header Background option.
The colours are set in the Customizer Colours section.
In the example above you can see how I’ve added a title and some links.