In the Delphi IDE the String type is highlighted as a keyword, similar to syntax elements like const, function, begin, end, or class. It seems to be the only type that gets this special highlighting, other types like Integer, Boolean, or Double have a "normal" color. Also there is no special color for other types similar to String like AnsiString, WideString or UnicodeString.
Out of curiosity: What is the reason the String type is treated special in IDE syntax highlighting?