Supremeequine makes custom blankets for minis and small ponies in lots of colors. I believe they advertise here. One of the companies that makes blankets for Ozark Mountain Mini tack used to make custom blankets/sheets/hoods in many colors. If you talk to Ozark you might still be able to get them custom, I'm not sure (they don't list customizing in their catalog).
Just for Ponies website carries higher end blankets in different colors for smaller ponies and some in mini sizes.
The only sport medicine type boots I've seen for small ponies and minis are only in black and white - again several of the mini stores on this forum offer them. Star Lake Tack makes custom sized regular splints & bells in various colors (mine are purple) but I don't think they have the supporting strap the goes under the fetlock like the Sports Medicine boots.
Wow - Thanks guys. I didn't realize that BMB was still in operation and available to the general public. I STILL have halters, headstalls and training tack that I made from lounge lines when my children were riding and wanted specific colors - from 1998! This year, will have to change out bad buckles, but otherwise this tack is all still usable!! I used to have a tack shop that would special order halter sizes that would fit my small ponies from BMB - our farm color is purple - in their quality and fantastic fit... I had a local leather worker cut and insert a buckle on the off side of the single buckle headstalls and then they fit our smaller ponies in the girls' colors (teal, fuchsia, red & our farm color of purple). I don't remember Mini companies in that year having various colors of headstalls/reins and NO ONE carried nylon training tack that matched then (most still don't)... I made training forks and the arab style, around the neck martingale w/ rings at different places, plus the lounge lines, too. Then had their matching saddle pads & leg wraps and we used to wrap the ponies when they were worked... Haven't done that in years, though. Our leg wraps (polos) got more work as wraps during breeding and foaling out, LOL. And those purple splints and bell boots - haven't been used yet either. They've been in the house now for 2 almost 3 years...
Don't have that many pics from those early years. None of Skye using her teal headstall with legwraps and saddle pad on any of our horses or ponies - though I know she did use them a lot (she didn't use them on the shetlands, though. On an arab and her 1/2 shetland son). Sierra used her "red stuff" on the most ponies of different sizes (she used "lucky red" on everything she rode) but again, don't have but a few pics that turned out...
Before she got her pink pad, too. Her favorite color now is purple