How to turn off night time filter for Android?

Every night at around 7:30 my phone screen turns a brown or tanning color automatically. I'm not sure how to turn this off. It's not anywhere in my settings. Can someone please help? The first time I turned it on was in Google play books, it asked if I wanted to turn on a night time filter to make it easier... show more Every night at around 7:30 my phone screen turns a brown or tanning color automatically. I'm not sure how to turn this off. It's not anywhere in my settings. Can someone please help? The first time I turned it on was in Google play books, it asked if I wanted to turn on a night time filter to make it easier to read in the dark. I looked through the settings in that app but couldnt find a way to turn it off. I have deleted the app but my screen still turns that tan color at 7:30 every night. Also, my blue light filter is always on so it isnt that. Can anyone please help? It's very annoying.
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