Is there some color markup for due dates?

I am maintaining a todo-list for recurring work. That means every now and then this work is pending, and I have a table with a ‘due date’ column. Checking the table just to see which rows are due is tedious, so I am thinking of alternatives.

Is it possible to enter ‘due dates’ that change color once they go into the past? Would it be even possible to alarm (email or other) the something changes the color?