Colours

Red (赤 Aka) is one of the seven Colours in the Digimon Card Game. It was first introduced in ST-1: Starter Deck Gaia Red as one of the first three Colours in the game.
Blue (青 Ao) is one of the seven Colours in the Digimon Card Game. It was first introduced in ST-2: Starter Deck Cocytus Blue as one of the first three Colours in the game.
Yellow (黄 Ki) is one of the seven Colours in the Digimon Card Game. It was first introduced in ST-3: Starter Deck Heaven's Yellow as one of the first three Colours in the game.
Green (緑 midori) is one of the seven Colours in the Digimon Card Game. It was first introduced in BT-01: Booster New Evolution as the fourth main Colour in the game.
Black (黒 Kuro) is one of the seven Colours in the Digimon Card Game. It was first introduced in BT-02: Booster Ultimate Power as the fifth main Colour in the game.
Purple (紫 Murasaki) is one of the seven Colours in the Digimon Card Game. It was first introduced in BT-02: Booster Ultimate Power as the sixth main Colour in the game.
White (白 Shiro) is one of the seven Colours in the Digimon Card Game. It was first introduced in BT-01: Booster New Evolution as an auxiliary Colour to the game.