I was able to change all the other SQL syntax coloring in Eclipse Preferences, but the normal (non-Sql-syntactic) text is still black and I couldn't find where to find the setting for that. Black text is kind of hard to read against an almost black background. Thank you!
If you are looking for the place to change the Text Editor color settings, go to Preferences->General->Editors->Text Editors, select "Foreground color" in "Appearance color options", uncheck "System Default", click on the color and choose the color you want.
If you want to change the SQL Editor color settings, go to Preferences->Data Management->SQL Development->SQL Editor->Syntax Coloring.
Edit: You need to change the "Others" item in SQL Editor's syntax coloring. It's working on my Mac, anyway. First uncheck "Default foreground color" and then choose the color you want.
Edit: For those not seeing the change, after selecting "Apply and Close", you must Restart your workspace to see the changes. File -> Restart