The business will become part of the Publicis UK network and move into its new Baker Street offices, which house Publicis London,
Poke, Publicis Chemistry and Publicis Blueprint.
Vivid Brand will retain its name and existing leadership team of the chief executive and founder, Andy Scott, the managing director, Gideon Karmiloff, and the planning director, Matt Miles.
The team will report to Guy Wieynk, the Publicis chief executive of the UK and Nordics.
Vivid Brand has 20 staff based in London as well as offices in Singapore and Melbourne. It specialises in shopper research, strategic planning, visual identity, in-store communications, digital shopper marketing and packaging design.
Arthur Sadoun, the chief executive of Publicis Worldwide, said: "Consumers are becoming increasingly empowered in the purchase process, and it’s important that we lead our clients through this important behavioural transformation.
"Shopper marketing is an important, insightful field that provides real results for clients across their commerce channels. The UK market is an important focus for Publicis Worldwide."
Vivid Brand’s clients include Nestlé, Coca-Cola, Pernod Ricard and Beiersdorf.
Scott said: "This partnership will create more opportunities to deliver world-class shopper strategy and campaigns for our clients globally."