Cobalt blue. The gorgeous hue is totally in right now and will easily transition right into fall.
Tall Royal Blue Lace Sweetheart Neckline Bodycon Dress: TopShop
Belted voile shirt dress: Net-A-Porter
Cobalt Skinny Cashmere Vest: TopShop
Tara Matthews Printed Silk Playsuit
Jersey Pencil Skirt: Topshop
Brian Atwood Felini suede peep-toe pumps 
Emilio Pucci Embroidered wool and silk-blend scarf
Prada Elastic & Saffiano Belt
Yochi Cobalt Rock Cocktail Ring
Yosi Tabitha Large Shoulder Bag