Why this Blue Colour appears when used Flash

[NinadRane]

This is a Design flaw, the colour beside camera appears in Photo, while using Flash, even after Removing back cover, I don't have any Camera Protector, This Samsung Note 20 - Regular, not Ultra, Exynos Version. 

[Ak5hay_09]

may be your mobile cover check it

[S_Kumar73]

Did u used flash. Check any back case that affects the flash or Check whether the back glass came out

[NinadRane]

No, this happens even after Removing back cover, and back glass didn't came out

[S_Kumar73]

Then only option you have to go to service center for physical check

[MuzikD]

Does it happen while flash off.. even a marginal blue light..??

[NinadRane]

No

[MuzikD]

Ok. So what blue light source you have.? If not then, is it happened only in this area or anywhere..? I mean try different angle in different loght situation