Depends on the class and jacket type. If you are in a regular division and not a special class then judges aren't as technical with the dress code . Also if it's a jacket similar to animo's style I would say maybe but if it's more like a traditional jacket with different coloring I would say yes.
I rode in a light grey jacket and it looked lovely. Though from you profile I recommend navy and hunter green because of the chestnut. It compliments the coat
i think that's a little out there. you could probably get away with it but i think stick with the classics
Im not sure I always go with Navy,