Here's a breakdown:
* Red hair: While not everyone in Scotland has red hair, it's more prevalent there (and in Ireland) than in most other places. Estimates suggest around 13% of the Scottish population has red hair.
* Other colors: Brown hair is also very common, as are blonde and black hair.
So, while red hair might be a notable feature associated with Scotland, it's not the only hair color found there. There is no single Scottish hair color.