Summary Header level Gridline Colours
 

We need a way to change the summary level gridlines in the Gantt. So for example i am working with a gantt atm with summary level that shows: [First day of week] - [last day of week] [Month] [Year]. And then a date header format of [Day of week] [Date].

The problem is that i want the First day of the week and last day of the week (The summary header gridlines) to be a different colour. So when scrolling through the gantt i can see quickly when the week changes without having to check the top of the summary header and looking for that light grey line.

Am i missing a feature or what?