A wonderful combination of tangy taste and crunchy texture, sweet bell peppers are the Christmas ornaments of the vegetable world with their beautifully shaped glossy exterior that comes in a wide array of vivid colors ranging from green, red, yellow, orange, purple, brown to black. Sweet peppers are plump, bell-shaped vegetables featuring either three or four lobes. Green and purple peppers have a slightly bitter flavor, while the red, orange and yellow are sweeter and almost fruity.