These images are designed by Garchen Rinpoche.
Rinpoche said that anyone may download, print, and use them freely.

Regarding the rainbow, Garchen Rinpoche said, “ It is very meaningful to put an image inside a rainbow. When a Dzogchen practitioner looks at the sun while practicing Togal, there are many rainbow circles appearing naturally in the sun. When we visualize something inside a rainbow circle, the image will appear quickly. Images in a thangka or picture do not appear in our mind so easily. Rainbows appear naturally. When we think of the yidam and so on inside a rainbow circle, the image will appear very quickly in our mind.”