The best thing about an all black ensemble is how neutral the palette is. You can really pair it any colorful accessory (from lips, purse, and/or shoes) to give it the vibe you want!
Lipstick YSL: Rouge Pur Couture (N55)
Blouse Banana Republic: Black Silk Blouse (similar)
Necklace Kendra Scott: Rayne Necklace
Pumps Ann Taylor: Kylie Pumps