I own a red 2015 TI which I purchased new in April 2015. When I received it the color wasn't bright red as I expected, it already looked faded brand new. I don't know is this is typical or if there was a problem with mine. I was disappointed it didn't look as good as I thought it would, but I didn't make an issue of it.
Soon after receiving it I applied 303 Aerospace Protectant to the entire hull in an effort to mitigate UV damage. This product made the color come alive, turning it a bright, vibrant red. I was amazed and intrigued by this. I then tried a multitude of other products I had on hand for cleaning and protecting plastic surfaces, but nothing came as close to improving the looks of the boat as the 303 Aerospace Protectant.
Here is a closeup of what the hull looks like with the product applied:
The product lasts about 2 weeks and then needs to be reapplied. Given that it both protects the plastic from UV as well as enhances the color, it's well worth the cost and effort. I'm very happy with the color now.
I chose red because as a former power boater I knew how difficult it often is to see smaller sized, pale colored boats on the water. Red boats really stand out and are far easier to spot. So this was a safety as well as aesthetic decision for me. So far I haven't had a close encounter with other boats, they all seem to easily see me.
The red color of my boat has not faded in two seasons of use. In addition to the 303 Aerospace Protectant, I keep it under cover when it's not in use. Hopefully with these precautions the color will last for many years to come.