I think she would look good in light colored tack, like Herman Oaks harness leather color. Kind of a "natural" OR a chestnut color on the light side. As for saddle blanket, black whit turgquoise
You could definitely do zebra! I have a gelding that looks very similar to her that I have zebra tack for and it looks really good. Plus it will be pretty unique since not many horses can pull zebra off.