Yellow Capsicums are 3 to 4 lobed fruits of the capsicum annum species. They are milder in taste than green capsicum, and so are known as sweet peppers. Orange or yellow bell peppers are more mature than green bell peppers and are harvested before they fully mature and turn red. They are glossy and smooth-skinned. Yellow peppers have an almost fruity taste and are very sweet. They are great for cooking or eating plain. Orange bell peppers aren't as popular as the other colors.