Years ago, I went to a dealer to order a car with specific color and interior. Nope, won’t do it. Maybe things have changed.
There will always be dealerships around, because they make most of their money on maintenance and repair and used car sales.
Every auto maker web site has a ‘build-it’ feature. Not every vehicle is available with every color is factory available, if that’s what you mean.
http://www.toyota.com/configurator/