Hi there, check if the blue light filter has been turned on by mistake, tha filter give a yellow tone to the screen. You can do that on the notification panel or setting > display > blue light filters. Hope tha solve your problem. :).
If the above fails then try it in safe mode if it works fine in safe mode then its an app causing it if it does not then the other step is to wipe cache partition and then finally a back up and factory data reset and then maybe a repair.
