In the main widget option panels settings, there are several customization options available.
Colors on Default Columns
Colors on the Sorted Column
Change text typeface/size/color/alignment
Style the Data Table text through the Text Panel (typeface, size, color, and alignment).
Add a stroke through the Stroke Panel (stroke color and weight).
Row heights are adjustable.
Customize individual Rows
Each row can be customized separately by selecting it and customizing it through the Fill Panel and Text Panel.