Don't play e6, play your bishop to f5 or play d4, d5, Nf3, Nf6, e3, Bg4
The colle system
yes you cannot really play the Colle vs KID set up, there have been options proposed for Colle players, playing a delayed classical exchange and playing Be2, and pushing Qside pawns but none of them are terribly believable. Grunfeld set ups are less strong though.
It would be very difficult to suggest a bad line for Colle.
There are no bad lines for Colle.
That doesn't mean it's not a good system.But it means that it's not a system that holds any nasty opening traps or surprises.
If you are losing against the Colle it's not because of the opening.Try to understand what you are doing wrong instead of trying something that you don't understand before you even understand which your mistakes were.
I might suggest that you don't understand the Colle tbh, Anand lost to the Colle Zukertort, Yusupov and Susan Polar have played it extensively it is a very difficult and subtle opening, I think you are missing the point somewhat
be sure to walk it every day- making sure it gets plenty of exercise or it will chew up everything in the house. Also be sure to bath it with flea and tick shampoo, and brush it thoroughly as their fur can get matted and tangled...
"... I remember Grandmaster Vlatko Kovacevic playing the Colle against me back before databases. I had no idea this was his customary weapon of mass destruction, and I thought I must have sat down at the wrong board. A GM playing 3 e3??
With that attitude, it won't surprise you to learn I got torched on the kingside around about move 25. ... That wasn't the only such debacle, either; every time my opponent played one of these vile things I was behind on the clock as I worked on my conception of the wheel, and just as you'd expect some of my wheels came out square. ...
...
... In the 1930s the top guys didn't know whether these openings or the Queen's Gambit were better. These were the 2700s of their day; they understood chess a lot better than I do, and if something wasn't obvious to them, it was arrogant of me to think it would be obvious to me if I just figured it out over the board. I could list easily a hundred 2550+ players who have succumbed to the openings in these books. These openings produce as red-blooded a struggle as any, and if you're not ready for it, you're starting at a big disadvantage. ..." - IM John Cox (2005) in Dealing With d4 Deviations
https://web.archive.org/web/20140627032909/http://www.chesscafe.com/text/hansen89.pdf
"The last fifteen years have seen a steady proliferation of opening repertoire books designed to meet secondary lines, many of which are not only respectable but dangerous for the unwary. These include some excellent books dealing with sidelines after 1.e4 e5 and 1.e4 c5 as well as works addressed to non-main lines after 1.d4 d5 and 1.d4 Nf6. Boris Avrukh has taken things to another level with his massive Beating 1.d4 Sidelines ..." - IM John Donaldson (2012)
http://dev.jeremysilman.com/shop/pc/Beating-1-d4-Sidelines-p3724.htm
Can anyone suggest a good line for black against the colle system