That is normal. My OEM factory rotors look the same. BTW all rotors in boxes come with anti-corrosion rosin coatings that have to be cleaned off the brake pad contact surfaces before installation. The rest of the rosin coating will burn off with heat. You could buy a set of rotors and have the non-contact brake pad areas powder coated it if bothers you.
Clean new brake rotors
I suspect there may be some confusion here, so I will try to clear this up. Your plain, cheap rotors come with a temporary oily coating on them to prevent them from rusting on the shelf. These must be thoroughly cleaned before installing them. These will rust very badly within a few years in the Salt Belt. I'm quite certain the rotors on the OP's van are of this variety.
The E-coated variety of rotors that I mentioned earlier are different. They come with a permanent coating for long term corrosion resistance, and are usually ready to install out of the box. The friction material of the pads quickly removes the coating from the contact patch within the first few brake cycles. This leaves the rest of the rotor completely protected from the elements.
Your OEM rotors may look similar, but they also have thousands of miles on them. The OP's rotors should not look like that after one week if the dealership did in fact install OEM rotors. Getting a brake job done at a dealership does not guarantee that OEM parts are used. The part numbers that were used should be printed on the repair order. The part number for the OEM front rotors is 4779712AB
(68223507AB for rear). As you can clearly see in the pictures, these are E-coated rotors. Albeit, the wheel mounting face is not coated. The lower line Chrysler rotors are sold under the Magneti Marelli brand. Their part number is 2AMV9712AA
for the front (not available for the rear). As you can see in the pictures, these are your plain old steel rotors.
The Raybestos rotors I installed on our van still have very little rust on them despite being on since last fall. The outer part has very little surface rust, but the middle part around the hub is still bright silver just like when they came out of the box.