Bad diff colours with Bazaar Explorer in a grey background (darker theme) desktop

Hi. I am running bazaar explorer in a Debian machine (not important), using Mate Desktop window manager, with a theme which is darker than the default. In this situation, bazaar looks like this, in my screen:

https://imgbox.com/uOIQ3ZPP

But the diff of 2 project files is bad, very low contrast for some kinds of things:

https://imgbox.com/FBsiaxs9

https://imgbox.com/P46sBLjF

Notice how symbols like "(){};" have low contrast with the background. Notice how some things become nearly invisible in the third screenshot i gave here: variable names of lines that contain changes; java class names, in function calls or property operation; and the 2 columns showing what kind of change happened in each part of the files compared (they are basically just 2 white columns, for me).