Is the image of the old man after his death color or black and white?

There was no color development technology before, or color images were expensive, and the afterimage was larger than ordinary photos, so most of them were in black and white. With the popularization of color development technology and the reduction of the cost of color photos, most people use color photos as portraits, which are clear, cordial, true and vivid, and can reproduce the voice and appearance of the deceased before his death. But some people think that using black and white photos is solemn, solemn and sad.