The existing HD master
Boys in the Band (which was used for the DVD as well, so you'd have to go back to the VHS/laserdisc releases for something different) definitely has that bizarre "smeary" look from the original
French Connection BD. (I saw that one compared to a colorization job and I think that's pretty apt, though at this point I've seen more convincing honest-to-god colorizations.) The
DVD Beaver caps demonstrate it well enough. I wasn't as bothered by it as I would've been with
The French Connection, where I'd seen the film more than once before (including on 35mm) and knew on some level what it had previously looked like, but there's still something obviously off. I've never listened to the commentary, but per the DVD Beaver writeup, Friedkin specifically talks about overseeing the color on the remaster.