Sounds lovely. I wish they had a horse on the site that you could put a colour on then put the saddlecloth on. But that is asking alot, what they have is good
I have bright blue on my dun. Lots of colours look good on a dun but lots look horrific as well, I'll try find some photos but pb is playing up right now.
Purple (big time sadly as my old horse used to have purple and black stuff), orange, certain greens and yellow off the top of my head.
They look good in red, blue (most shades), minty green/blue, pink and he looked suprisingly good in the hunter green and yellow colours we had on from the rc.
Black or navy with pink stars would be nice and would go with clipped out and summer dun pony.
Some thing like this would look nice the glittery stars might make up for not being all pink, could have all the stars pink I just made some blue as an example.
I had some from Super X Country this year (find via google won't let me post a link). They did sponsor me a set but was impressed with quality and they are much admired.
You can have most colour bases, and loads of colours and patterns to choose from. Website is totally interactive, really enjoyed playing on it when ordering mine. http://www.custom-xc.com/