Iphone screen turn blue. Iphone 12

Hi, i had this issue for the very first time. My screen turned blue for few seconds and then Back to normal. And since my purchase of this phone my ios has not been updated/I didn’t receive any update.

My iOS version is 14.4.2

Night shift is OFF

True tune is ON

I’ve read the previous users comments and your response on that. So sharing the few details you’ve asked to them.