Old thread but some of the best reefer I ever smoked was called Rainbow.
This was back in the early 80's though and didnt look like any of those pix.
It was more red than purple with gold and dark and light shades of green.
It tasted a bit like hash and had both a Saltiva and Indica buzz.
Never found anything like it since.
i don't think various shades of purple and green are so hard to find. EG, here is Green Crack S1, and I assure you this pic is entirely unedited and 100% legit:
Here is the exact same plant a few weeks earlier right when it started to turn color: