I'm very much enjoying looking at the pictures of horses, and I hope people post more! I'll have to post mine when I get access to my pictures.
I love horses! We just got another horse, beautiful bay roan draft cross. She's great! Thinking of breeding her to a black Percheron and trying for a blue roan baby. Thoughts?
I admit I know nothing about your mare, but I don't think this is a good idea. First, you can't be sure what color the foal will end up being. Second, it's irresponsible to breed just for color. Do you have a specific need for a blue roan foal? Or were you just planning on selling it? In this economy, there are many unwanted horses, and the majority of them started out in life by irresponsible breeding.
Now if you told me that your mare has great breeding, has excellent conformation, and excels at her job, and you found a stallion that also had great breeding, went beyond exceling at his job, and had conformation that complimented your mare, and together they would create a foal that would excel in the specific job you had in mind regardless of color, then I would be more supportive. But without looking at the full picture other than color, you end up with a horse that MAY have a pretty coat, but could have major conformation issues, health issues, and many other surprises. There is little market for a foal like that. And regardless of whether you plan to sell, sometimes life ends up making you end up having to sell.
I'm hope I don't come across the wrong way because I know it's tempting to breed a mare. But it helps to look at the big picture. You mare may be worth breeding, but don't base your stallion choice off color. Base it off of picking a stallion that will compliment your mare, and improve her faults. It's much better to have a plain colored horse with ability, temperment and excellent conformation than it is to have an unusual colored horse that you end up not being able to do anything with.