How to fade an image

I’m trying to fade in a background image. I’ve managed to make it work with a background colour

    deathMenuImg.color = Color.Lerp(new Color(0, 0, 0, 0), Color.black, transition);

But I’d like to do it using an image I made

Anyone have any suggestions

If it is part of GUI, then simply animate the alpha channel of the color of the image / raw image. If you want it to fade in, first frame should be having alpha = 0, and the last frame should have alpha = 255. Opposite goes for fading out.