ComboBox: set a Line in Red ?

In a project, I have to assing people for Meetings.

I also have to deal with people that can be absents. I have ideas on how to achieve that, but I must flag to the user when a person cannot be assigned on absent day(s).
Of course, I can change (if possible) that person line in the ComboBox as Italic and 10 pixels heigh (instead of Standard / 12 pixels heigh), but I prefer to set the name in Red.
As user feedback, people will understand a name in Red is not selectable, IMHO.

The question is:

Can I draw a text line of a ComboBox in Red ?

no, not in the supplied combo-box…you will have to create your own using a listbox

Thanks Dave.