GHCi in colour
From HaskellWiki
This page documents efforts to colourise GHCi output, like this:
1 Implementation
1.1 Using HsColour
An existing tool, [HsColour http://www.cs.york.ac.uk/fp/darcs/hscolour/], could be modified to operate interactively.
If you have an idea of how to do this nicely, add your proposal here.

