What all colors can tornadoes be?

Question

I have heard some can be black, some can be white, and some can be grey.

Answer 1

they can even be red. it all depends on where the sun is, the objects it picks up and the color of the soil. most common colors are light grey, white,pitch black, grey, red.

Answer 2

if the tornado is "front lit" by sunlight it will look white. with the Sun behind them they look black to dark grey.

Answer 3

Tornadoes take on the color of what they are swirling up into the funnel.  Most of the time they are grey due to the dust and dirt.