I have often seen blue or aqua insulators that look green when photographed against a tan or light brown background. Even a light wood table will cause this effect. Recently, somebody listed a 202 as blue, but, with the tan background, it looked green. I wrote the seller and asked if they would post a picture taken outdoors with a white background. You can see the difference; and even the seller was surprised. Although I have four or five picture comparison examples of this effect, this was by far the most significant difference. Thought this might be of interest to a few people.