Gantt chart, how to color weekends in OTHER colour than grey?

I have seen some post regarding the possibility of changing the colour of the columns marked as "non working days" and all suggestions to solve this seems to point to the possibility to change the colour of rows.

So, I am again asking about the possibility to change the the colour of columns to enhance the readability of the Gantt view.

Is this still on the ToDo of Smartsheet or is there a setting I havent found to do this?