What all colors did the nelson Jax bookends come in?  

Commonly attributed to...
Commonly attributed to George Nelson, but I believe that it was designed by Bill Curry for DesignLine,Calif.
The only colour that you did not list that I have seen is yellow, but it could easily have been repainted.

Commonly iron, was there a li...
Commonly iron, was there a lightweight resin or wood one ever in production?

I wish this would be cleared up once and for all
I see too many people claiming these are a George Nelson design. This I do know: the Nelson office never had anything to do with designing an oversize jax that could be used as a bookend, doorstop, or paperweight.
Bill Curry did create a plastic table in the shape of a very large jax with a glass top. I have one. It's clearly marked Design Line and Bill Curry.
The metal jax bookends seem to have been a popular item in the Pop Art late 60s. I have a number and while the painted iron design is probably the most common, I have or have had them in aluminum with a matte finish, polished chrome and brass as well as the colors mentioned. I've also had them in different sizes that were clearly mold made (presumably by a different manufacturer) and even hand-made by a machinist. Woof, I've never seen a resin or wood one, just assorted metals.
My thought is that people attribute the bookends to Bill Curry because of the table (a jump in logic perhaps, but understandable). Where the Nelson attribution comes from I don't know, but it is not accurate and only gets propagated due to eBay sales of the bookends.
If I were to bet, I'd guess that Design Line did not make the bookends (the table and stemlite lamps are marked, why not the bookends?) rather I think it was likely a popular novelty just like the "A" and "Z" shaped bookends of the same era. But if someone has an advertisement or catalogue proving me wrong, I'm happy to concede.
Here is the table, albeit with the wrong size glass top. This one is 24" where the original was 30" before it was broken.

I am inclined to agree with P...
I am inclined to agree with Pegboard. The over-sized jack were quite commonly used as a 'pop art' accessory and probably produced by many different manufacturers.
I had read somewhere that the Nelson attribution was supposedly based on an advertisement for George Nelson shelving which showed the shelves holding a variety of objects which included a pair of over-sized jax.

Bill Curry Jacks
Bill Curry was a neighbor of mine in the 50's in Playa Del Rey. He was a fantastic artist!
He designed the large jacks as book ends and door stops...I had a pair but one was lost in a move. Akron was a chain of stores back then and started making a copy of the jacks. By the time the legal system kicks in...they stop making them! We moved...they moved and we lost touch...But you can take my word....He designed those large jacks! There were 4 curry kids...I can only remember John and Mark's names....They could verify what I'm writing. A couple of middle aged guys now!!! Good luck
Catwoman

Interesting photo
Interesting photo/story at this url
http://billcurry-designline.blogspot.com/

i bought a pair in yellow...
i bought a pair in yellow and Pink at a local auction for $7, I thought it was faded red but when i look at it I can easily tell it has not faded and is still in great condition as is the yellow one.

Jax
If you go o Bill Curry's web site, you'll see a picture of him surrounded by various Stem Lites and bookends, including the aforementioned "Jax." Regards, Kevin ModMarket
http://billcurry-designline.blogspot.com/

Giant jack table seems about ...
Giant jack table seems about the dopest of the dope. My bookend is steely looking, the center is finished black, $1 at the flea market. I wonder how many of them are out there?