It will depend on what car you have, but in most cases the split screen colour scheme is rom_col_2, have a look in the "colours for widescreen" section.

__________________
Sept 03, M3, Silver Grey. Retro-fits: Modded Mk4 DVD Drive, OEM Bluetooth, VR Control, Rainbow Speaker Upgrade, Sony SOT Amp, HK Sub, CCFL, Intravee II, NightMode.