i didn't know that fact until i came to this thread because of the new movie. and i consider myself way more of a comic book fanatic than the general population.
i didn't know it had to do with the color alone. i really think the color thing needs to be thought out. simple reaction to the color wouldn't work. there are too many things in the world that are yellow for it to be a genuine weakness.
green does not weaken superman. and this is also the first time i heard wonderwomans' belt gives her her powers.