Your plant looks fine to me. That reddish-brown top growth is entirely normal. As those new leaves mature, they'll turn a deep, dark green.

I can't see any of the brown spotting.....can you post a close up photo? It may be nothing more than physiological damage but need to see.

It may be a bit stressed from planting. Monitor it, water as necessary and maybe provide a bit more shade protection until it settles in.

Here's a closer picture. You can see the brown spots towards the bottom.

I would expect a recently planted camellia to loose some foliage as part of transplant shock, especially if the soil has not been mulched, it is almost the start of summer and the soil does not look that "moist",

Make sure that it is planted slightly above the surrounding soil.

While it can handle full sun, it may have a hard time if it was planted almost at the start of summer. Make sure the soil is kept as evenly moist as you can. Water if the soil feels dry.

I could not enlarge either picture enough to see leaves individually. I assume that browning of a leaf is due to water issues or dropping of old foliage (happens in May-June). Not sure if you have brown spots though. A close up of a single leaf with those spots would be useful.

Give it 2-4" of mulch up to the drip line or beyond. Water the soil (never the leaves) with about 1 to 1.5 gallons now that it is getting warm or hot. No need to fertilize if it still has those round fertilizer pellets. In that case, fertilize next year in Spring.

Where are you (city, state, USDA Zone)?

Thanks for all these helpful replies. I'm in central NJ. Zone 7. This is s closer picture:

That is sunburn. It can occur when a plant is not fully acclimated to its new spot. Often happens with covered or greenhouse plants at a nursery when the are moved out all at once into more sun than they are used to.

It is not serious and the plant is not sick. Those leaves won't recover their unblemished state but they are still doing their work. Leave them be.

Yes: with its widely spaced, very dark leaves your plant looks like it came out of a shaded situation that it was in long enough for its appearance to have been affected, is now burning in the much brighter exposure it has been placed in. Even though it is shaded after 1PM it is apparently getting enough sun in the morning to get cooked on the one side.

does that mean this location is too sunny?

At the moment, yes. But not necessarily when your brand new plant gets used to it. In the meantime, just provide some temporary shade.

Many of these plants are grown in greenhouse environments where they get what I call a perfect environment for mass production: controlled/limited direct sunlight, controlled humidity, controlled water delivery systems, etc. Now, you throw them into the real world and the different humidity/water levels, direct sunlight, etc causes them to pout until the root system and conditions are more to their liking. That sometimes requires that they drop the current set of leaves, develop new ones better acclimated and have a bigger root system.