aliie's mom- in case your concerns aren't that your puppy is a dalmation- let me add this- we got our female chocolate puppy 5 weeks ago- she was 10 weeks old at the time- she had a light medium chocolate coat, but the outer "guard-hairs"- the longer ones on her back and sides were very dark chocolate. She looked kind of "two-toned." I was like- hmmmmmm. But......in the last 5 weeks- she has developed a gorgeous, silky, all-over deep dark chocolate coat. I think maybe they grow into it.
Lexismom has a choc...Lexi. We saw her over the weekend and she was lighter in color than when we saw her at Christmas time.
Deb said she loves to bake in the sun in the front yard.
When I got my chocolate, Lexi (she's a rescue) she had been a stray in Louisiana. The rescue told me that chocolate labs coats, sort of like a burnette's hair, will get lighter when they spend alot of time outside, especially in the sun.
Like Susan said, with the warmer weather & my working from home now, Lexi is spending more time outside during the day. I'll often find her sprawled out in the lawn sleeping in the sun, which is make her coat lighten up.