[plt-scheme] pink or red?

>From http://docs.plt-scheme.org/quick/index.html

""""
Try giving circle the wrong number of arguments, just to see what happens:

  > (circle 10 20)

  procedure circle: expects 1 argument, given 2: 10 20

Note that DrScheme highlights the source of the error in pink.
"""

Doesn't look like pink to me. :-)