With “available”, you mean if they exist today? Sure they do. They have the same shape as any carrot, but have other colours that are more common among other root vegetables. My family sometimes buy them just to get some nice colours in our meals and salads.
I agree with 213 though. Making carrots in different colours would be one of many details in the world that shows the difference between their time and our time. There could be a lot of details like this, like tools, plants, professions or whatever, that you stumble upon and just have no idea what it is. Then you do a little research and find out it’s something commonly found in the middle ages that has fallen out of use since.
