Yes there is a way to do it.
1) CLOSE PROCESSING.
2) Go to the Processing preferences.txt file.
- On a mac it is here: /Users/tegabrain/Library/Processing/preferences.txt
- On windows it is here: in Documents and Settings → username → Application Data → Processing → preferences.txt. On Windows 7 (or Vista), it’s in Users → username → AppData → Roaming → Processing → preferences.txt.
3) Open up this file in a text editor and search for
4) change this color to #000000 (to make it black).
6) reopen processing and try it out