Yes, but their color won't be pretty. All the canary types are the same species. Like all dogs can breed, all the canaries can too. Dog mixed breeds are called mutts (and sometimes 'designer breeds') and mixed breed canaries are called kitchen canaries.
Occasionally, you'll come across canary mules. These are canaries crossed with similar species (like Siskin, gray singers, etc) that usually produce infertile offspring , but the males are prized for their singing.