[Gambas-user] How do I change foreground and background color of GambasEditor control

[francesco]

I would like to change them at runtime. I have developed a little IDE for 
NASM, and have used a Gambaseditor control to edit assembly source programs.
I have seen that it is possible to change foreground color and background 
color at runtime using the color property of the GambasEditor control, 
looking at the code of the Gambas Ide. But I have only been able to set

editor.colors[background]=&HFFFFFF&

I don't see any foreground constant in the help

Francesco