The colors wouldn't exactly make sense going both before and after the current page. For example, with your pink path leading up to the current page, those 'pink visitors' travel across all of the different future pages, so it would not make sense to make them all pink too.
You can create flow reports in such a way that highlights the next pages, which will colorize those next pages accordingly. You can also hover your mouse over next pages to get a temporary coloring, but that 'blues out' the pages going in the other direction.