Rainbow peppercorns is a mix of dried black, white, green and pink berries. Each peppercorn brings a slightly different flavour and heat. White, black and green peppercorns are from the same plant but processed differently. Dried black peppercorn, the most common variety, has the strongest flavour and is used in everyday seasoning. Green peppercorns are under-ripe black peppercorns that are generally soaked in brine, but you can find dried as well. Green peppercorns have a sharper spiciness to the flavour. When you remove the skins of black peppercorns, they become white peppercorns. I find white peppercorns to have a mild tone but still gives a lot of heat. And then finally, there is pink peppercorn which is actually not even a peppercorn! Just like Sichuan peppercorns, pink is a berry and is from the cashew family. It is not as hot as the other peppercorns but has a fragrant, floral aroma. And its wonderful colour definitely adds to the visual effects.