Best night time temps to bring out color??

I've seen some of your guys posts with some amazingly colorful plants. I know it has a lot to do with genetics, but I understand cooler nights can also help.

For those who've had success, what temps are you dropping too @ lights off?
I just got in some Granddaddy Purple and am really wanting to make some beautiful plants. I'm normally around the 66-68F range @ night, but I can drop it down by mixing in outside air once temps drop some.

I saw the new Zkittlez from ILGM the other day and it states to bring out the colors run cold @ night but not drop below 50F. That sounds pretty low to me so looking for any and all suggestions.

I think it has more to do with the temperature difference between night and day as the heat expands and contracts causing bruising or purple in the buds

I think around 10-20 degrees otta do the trick for ya

If you want some color look into @bigworm6969 . Almost all the gear I have gotten from him has plenty of purple phenos. As far as cold temps to bring on color it works at like 60-64 degrees. Im not sure about going colder than that.

A true purple plant will turn purple early in flower even with high temps.

Last two weeks drop down to the 50’s if there purple in genetics it will express those colors your looking for. Your trying to mimic cold fall weather like the season changing. Also will make your flowers more flavor and denser if the genetics are there.

Here's a white widow auto at temps of ~9°C - 48°F at night.
Not a huge amount of purple but it's trying. I don't think they're well known for purpling up normally.

I done GDP a while back and had indoor night temperatures of around 16°C - 60°F with no sign of purpling.
But I'd a couple of clones of it in the deck outside at far cooler temps and they went reddy purple colour.
Hope that helps.