Which color of bell pepper is considered the sweetest?

The red bell pepper is considered the sweetest variety among bell peppers because it has ripened fully on the plant. As bell peppers mature, their sugar content increases, resulting in a sweeter flavor profile. Red bell peppers are allowed to remain on the plant the longest, accumulating more nutrients and sugars than the other color varieties.

In contrast, green bell peppers are unripe and tend to have a more bitter and grassy flavor. Yellow and orange bell peppers fall in between green and red, being somewhat sweet but still not as sweet as red bell peppers. Their sweetness increases as they ripen, but they do not reach the same level of sweetness due to being harvested before fully maturing to red.