Back in October, users that updated their Nexus Players to Android 6.0 were having issues with video playback, complaining that locally stored videos had incorrect color reproduction, blacks looked like grays and colors looked washed-out altogether.
"Hey everyone, We understand the severity of this issue. It's a widespread problem impacting all Nexus Players on 6.0. We're working as fast as possible to resolve it.
We also noticed similar problems on Nexus 6P and 5X, as reported in #14; however, those had a different root-cause. Those have been fixed internally, and will be included in a future MR."
Google has acknowledged that this is an issue and stated that it’d be a high priority issue with fixes being worked on “as fast as we possibly can”. The developer team has also mentioned that the problems with the Nexus 6P and 5X are also fixed and will be rolling out in a future software release.