AFAIK the Fender's Competition Blue paint color is called Lake Placid Blue.
Some of the discoloring happens due to aging of vintage paint. If the guitar finish is new of course it would be shiny and bright.
I can't remember exactly which website I read it. But this color matching issues between "vintage competition blue" and "reissues" was explained in detail.
Maybe if Fender USA reissues a'73 Competition Series" and "Road Worn" Mustangs. You'll see the difference side by side. Then it will then retail for $2,000. It sound like a joke but I can see it happen.