You can find the class of that column let's say some SBS4 value and then add a css in OnReady JS:
example: jQuery('.c11').css('background-color','grey')

Please update the class which I used (c11) with the class which you can see for the last one.

Great thanks for responding. Where would I find the class of the last one?

Just take the console icon (arrow icon) to the column for which you want to update and get the class value (class="").

Just right click on the page to get the console screen and from there you can find an arrow icon at the left most area. Click on the icon and then take it to the element you want to find the class. For example the last scale point. There you can find the element's class, id and every other details. Just pick the class value

Also you can just press F12 for getting the space options.