Bell peppers, one fruit that's often mistaken as a vegetable, vary as much in taste as they vary in color.
Green bell peppers taste more bitter than the others for the same reason they cost less: they didn't harvest as long.
As peppers ripen, they become sweeter. So, yellow peppers are sweeter than green, and orange versions are sweeter than yellow.
As the most fully ripened bell pepper, the reds are the sweetest of them all.
Because the different colors taste differently, they also often serve different purposes in the kitchen.
The bitterness of green bell peppers make them best for cooking with, although you can still make delicious recipes with red bell peppers.