What Does The Green Colour Indicate?

Hi,

Could somebody tell me what the green colour on the "Rows" and "Size" columns indicates? (see image)



I see that it is controlled under Preferences -> Display bars in various list columns, but I have not found any documentation to tell me what that means.

Thanks for the help,
Chris

The green bar is a graphical indicator of the field value, compared to the other values. Similar to a chart.