As the appearance of the rainbow in the clouds on a rainy day, so was the appearance of the surrounding radiance Such was the appearance of the likeness of the glory of the LORD And when I saw it, I fell on my face and heard a voice speaking.  Ez. 1:28

And He who was sitting was like a jasper stone and a sardius in appearance; and there was a rainbow around the throne, like an emerald in appearance.  Rev 4:3

I saw another strong angel coming down out of heaven, clothed with a cloud; and the rainbow was upon his head, and his face was like the sun, and his feet like pillars of fire;
 Rev 10:1