A family of Microsoft word processing software products for creating web, email, and print documents.
You can create a custom table style in Word, but there is a learning curve. The setup tool is anything but intuitive.
Create a blank table in Word. The Table Tools tab appears. Click on Design, then on the Table Style Gallery opener (it has a horizontal line over a down-pointing arrowhead). At the bottom of the dropdown, choose New Table Style.
The key to using this is to format different parts of the table style by changing the Apply formatting to: dropdown. Start with the default Whole Table and set the background characteristics that will apply to all cells. Tip: don't expect anything from font formatting here, it's broken. Use the Format button in the lower left corner to set margins for the table as well as most other properties.
Then change the Apply formatting to: dropdown to Header row and set the properties for just that row. Color banding is done by formatting the Odd banded rows and Even banded rows.
It will take many tries to format your first custom style. After creating the first one, use the Modify Custom Style choice from the Table Styles Gallery dropdown to revise your style. The above is just a rough outline, here is a tutorial with more detail: Custom Table Styles