CF75 theme color problem

[saga_gx]

Hi, I have been making my own themes with the theme editor,
The problem is that when I receive a call , the external display appears black and the font color is also black, so I can't see the incoming number,

someone knows wich color item is the one for the external display backround and fonto color??

thanks


and another question

can the applied themes be erased without the data cable??