Problem to theme IDE

i'm on ubuntu 20.04 and i've just install Arduino IDE beta 1.9.0

i'm trying to make black theme IDE but there is a setting i don't find .
For example numbers after = are always black so i can't see them on black background.
The {} or () also dark.

I thinked i had to change editor.fgcolor

# foreground and background colors
editor.fgcolor = #f4fefe 
editor.bgcolor = #01020D

but it's always dark
Any idea ?

i attached a pict