I was working on a enderman farm in a creative world, when I suddenly realized that my hotbar looked very blue, and once I saw that, I realized that the entire UI was blue, because I had night vision effect on me. When I got rid of the night vision effect, the blue tint went away. To replicate, simply go into a creative world and give yourself night vision.
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Thank you for your report!
We're actually already tracking this issue in MC-161849, so I resolved and linked this ticket as a duplicate.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
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