Capsicum should be a uniform, glossy colour, firm. The peppers can be round, long or square. Depending on the variety, it may be mild, sweet, hot or fiery. Capsicums are also called green, red or yellow peppers. The two varieties are sweet pepper or chili pepper. Sweet peppers are green, orange, red or black capsicums with a mild flavour. Chili peppers are significantly smaller than sweet peppers. They are also green, orange, and red but are extremely hot.