I haven’t quite figured out the calculus of this, but sometimes colors that don’t “go” can be made to harmonize if surrounded by enough other colors. I wouldn’t normally pair a rust-colored tank with an orange cardigan, but here it works as part of an autumnal theme.
Brown tights: We Love Colors
Rust tank: Chicos, eBay
Orange cardigan: Max Mara Weekend, eBay
Brown skirt w/zippered gussets: Looks boutique
Denim jacket: Levi’s, Oona’s
Brass & crystal bracelet: eBay
Pearl & grosgrain necklace: Talbot’s