She completed the look with a pair of black velvety leather court shoes with an asymmetric top line by Giorgio Armani.
For accessories, Meghan chose to wear her Logan Hollowell Leo constellation ring which retails at £1,344.
Royal fans were quick to comment on the duchess’s look and they seemed to have loved it.
One user wrote on Instagram: “Such a gorgeous colour on Meghan. This may be my favourite look of the year on her! Also live how the brand has styled it.”
Another one said: “Really polished; I’m surprised that I really like the black shoes with this look,” while another one added: “Whatever she wears is always so beautiful [brown heart emoji]”.
A fourth one chimed: “Wonderful classic and chic monochromatic look. Elegant and professional. Love the cohesive styling from head to toe. The Duchess looks wonderful.”
The event took place just a few days before Omid Scobie’s book Endgame was released.
It comes as a body language expert claimed Meghan looked “tense” and “low key” during the event.