Right-justify the numeric column, please! Add some padding to the right side so that they don't jam up against the edge of the container (and left padding for the first column).
You might be interested in a more subtle color indicator at the left ()or right) edge of the cell by just setting a thick colored border on that cell. See Filtering a table with Named Querie with 3 checkboxes in Ignition Perspective - #17 by Transistor.
You can examine the style structure in the Folsom cell on the default Table component data.