1. How long ago did this happen?
2. What kind of dog is this? Weight?
3. How much did he/she eat?
4. What kind of paint?
Do you have the paint can? Does it contain lead? How is your dog acting? Any vomit/diarrhea/lethargy? Can you estimate how much was ingested?
The only concern would be if the paint contains lead, which I don't think it does. If he ingested a large amount, he would need treatment right away. Given his size, and the fact that he probably did not ingest many chips, he should be fine. If you notice any vomiting or diarrhea, or he seems lethargic and acting out of the ordinary, he needs to see a vet immediately. If your local vet is available this evening, you can let them know what happened. They may suggest giving him activated charcoal, but again, this treatment is only necessary if the paint chips contained lead, and this is usually only the case in homes painted before 1980. You can feed some bread to help the chips pass through his system. I hope this helps. Let me know if you need more info.