In case that you like to use one of your classes.
Choose the color for your fonts so texts will be readable. This will override your row color selection.
Set the color for your headings. Select among default, light, dark or one of the primary colors. This will override your row color selection.
The main parameter you have to set in columns(general tab) is the font color for the column.
Here you can set background colors, paddings, margins and borders for the columns content.
Width & Responsiveness
First of all, you can change the width of your column. Additionally, you are able to set the responsive behaviour of your column in various devices or even to hide columns.