Color Schemes for Tables in Documentation

[Keith Hansen]

In my documentation, I frequently use tables to present data. My tables
have the following color scheme:

* Headings at the top of the table are navy blue with white text.
* Below the headings, all other table cells are light gray with black
text.

Here's my questions: 

* For tables in documentation, are color schemes purely a matter of
personal taste? Or are there any color schemes that are commonly used
and accepted?

* What color schemes do you use in tables?

Thanks for the input!

Keith