The new packaging is now rolling out across the country.
The gift range includes: the Seasonal Edition Miniature Bar Collection; the Miniature Bar Collection; Mint Squares; Dark, Milk, and White Chocolate Squares; and The Assortment.
Natalie Chung, creative director, Pearlfisher, said: "Gifting, by its very nature, needs to inspire warm emotions. This colourful new identity follows on from the introduction of the 100g bars and ensures stand-out and coherence of the range on shelf."
Pearlfisher worked with Green & Black's as design partners.
Natalie Brown, Green & Black's senior brand manager, said: "We are a contemporary brand in a traditional category so we feel this new identity will give us a greater USP and standout for consumers. We also had great success with our vibrant Easter packs."