The default shade of the Elegant Formal Dress matches the skin tone of the horse fairly well, and strangely the black background of the cloak combined with orange dye creates a nicely matching brown. The circlet is an attempt to link the outfit to the sea blue gems on the tack.
Full Details:
Head: Turquoise Summer Circlet
summer festival cosmetic barter item, no min. level required, often available on Auction Hall
Chest: Elegant Formal Dress (default dye)
in-store-only, cosmetic item, no min. level required
Back: Golden Tree Summer Cloak (orange dye)summer festival cosmetic barter item, no min. level required

