Our ring video doorbell has pink video during the day.
That would be because the IR cut filter is stuck. That filter is used for improved night vision. But if it is engaged when the IR leds are not on, then it turns the image pink.
You can try gently taping the device to see if the filter resets. If this persists then you need a replacement unit.
we just moved into our new house that came with a ring pro doorbell already installed, and just connected to it yesterday. I noticed immediately that the right hand side was tinted pink…we tried shutting off the breaker and turning back on to restart the doorbell in case that might help, but no luck. Has anyone else experienced this and know of a fix? Thanks.