You can change the syntax highlighter's color scheme to one of the other Smalltalk system's preferred style via the settings menu ("Settings" -> "Tools" -> "Syntax Color").

Choose one of the known schemes from the list after the "Reset To"-Button, then press this button. At first, you will get a preview. The setting is installed when you finally press the "Accept" button. It may be required to reselect the current method in the SystemBrowser.

You can also define your own coloring scheme there.