There is the possibility that Line 6 has not actually built U.S. models in all available colors yet, since they are supposed to be custom ordered.  It would be nice if Line 6 took pictures of each guitar after they made them and then posted them on the website.

I would suggest trying to find color examples at named websites.  For example, I assume the JTV-69 US colors look similar to Fender colors.

My guess at the JTV-59 US in see-thru blue would be this:

http://shop.musix.ch/ecommerce/product_info.php/products_id/130967/language/en

I was also looking for this particluar color. Not easy to find it, but here we go!  Seethru Blue or Trans Blue

Hope this helps, Albi