What happens:
Looking certain directione during the night with night vision create very vibrant and incorrect colors for the sky that can change very quickly when changing your view direction. It seems to happen whn looking the opposite direction of the moon and down a bit. The colors include a very bright yellow, followed by a deep blue.

What I would expect :
Color doesn't change so much during the night changing view directions.

To reproduce:
Start a world
Place a command block and set it to repeating and power it.
Put /time add 30 into the command block
(To prevent lag on some devices run /gamerule commandblockoutput false to prevent chat spamming)
Time should now go faster
Drink a night vision potion and face the direction where the sun sets and down a little
Observe at certain times durring the night there are odd colors that show up for the sky

Tested on the following devices:
Samsung Galaxy Tab 4 10.1 Android 5.0.2 MCPE 1.1.1.0
Samsung Galaxy S4 Android 4.4.2 MCPE 1.1.1.0
Windows 10 MCPE 1.1.0.55

Note: I checked and made sure none of the devices had any resource packs applied.