You can't !
All the different parts of a numeric control cannot be accessed programmatically for editing. This is the case not only for color but also for relative size and positions (see for instance the increment/decrement arrows in a numeric control).
A poor work around is to paint the control parts with the "invisible" color, and to superpose the control and a decoration (which color properties can be accessed through a property node). The look is not allways very nice, but it works...
See the attached vi.
CC
Message Edited by chilly charly on 04-20-2005 05:41 AM
Chilly Charly (aka CC)