The color of Vishnu Bhagavan is mentioned in Mahabharata.
In the Krita Yuga, He is White in colour.
In the Treta Yuga, He is Red in colour.
In the Dvapara Yuga, He is Yellow in colour.
In the ...
The word specifically used is देव, Devas exist according to Veda and other scriptures.
Does Allah exist? Or Yahweh? (in the form of their interaction with jesus/mohammed and humans)? Definitely not