How low does ambient lighting need to be for Alienware oled not to haave purple tint

How low does the ambient lighting need to be for the aw3425DW for the brightness limiter or watever it is that makes it go purple to stay off

i have dimmable LEDS in the room,but i don't want it PITCH black i can't see shit..

I have a new screen coming and want to stave off that Purple tint when it's too bright in the room