I’ve had a similar issue with a purple wash with HDR content; my TV wasn’t displaying it correctly but it was fine on my phone.
Unless you are transcoding a particular video, the server has nothing to do with it since it’s just sending the raw video stream.
On your PC the client probably uses the OS’s capabilities for decoding, so that depends on the hardware you have and the codecs that are installed. I can’t really help with that, but there’s gotta be more information out there.