...

This page outlines an example of how to style table columns using the CSV Table macro, Table Plus macro, Attachment Table macro, or JSON Table Macro, which are part of the Advanced Tables for Confluence add-on.

...

Since release 6.4, there is now another option for column styling with the columnStyles parameter. It defines column level CSS at the HTML column level where as the columnAttributes parameter works at the element level and provides more than CSS styling capabilities. columnStyles can be easier to use and is recommended for most use cases. However, it does not cover every use case that is available with the columnAttributes parameter. 

Macro Browser Input

Select this Macro

Define these Parameters/Values 

Each column can be styled by setting the style attribute. For example setting the columnAttributes parameter to:

style="border:0;background:lightgrey;"
style="border:0;background:lightyellow;"
style="border:0;background:lightgreen;"

Screenshot

Wiki Markup Input

For a table built using the CSV macro:

...