'equery -Ch' output isn't colored, but 'equery -hC' output is colored. It's true for all utils in portage-utils & gentoolkit. May be is't not bug, is't feature :-)
That happens due to printing the help immediately upon finding the -h option parsing the cli options. At that point it did not parse the remaining options.
Equery, eclean, enalyze, new python version of revdep-rebuild are fixed in commit
I did not check any of the non-python based programs.
Released in gentoolkit-0.3.0.5