what color would the earth be if it became (or was) a "dead planet"?

I would go with brown. I just see a lot of dead vegetation...

If no atmosphere at all, the Earth would've looked just like our moon - dead piece of rock, the dark greyish in color.

If atmosphere with negligible amount of Oxygen & ample amount of green house gases, the Earth would've looked like planet Mars - desert barren, soft reddish in color.

"earth tones." The water would be a pure, clear blue (because there would be no living green things, animals, animal poop, trash, etc)... all the green (from chlorophyll a and b) would be gone... so, blue water and brown/grey/white/black ground. sure there are "precious stones" that are different colors but those usually occur under ground at high pressure and/or temperature.

The usual projected color is red as the oxygen has to go somewhere and 5% of the crust is iron.

Light brown the color of the driest soil

If the star is red or orange, it becomes a white dwarf. IF the star is blue, it becomes a black dwarf.

~David

red? like mars kuz supposedly it used to be like earth