Capsicum or Bell peppers come in various colors, including green, red, yellow, orange, and even purple. The color often indicates the ripeness and flavor profile 1.) Green: Slightly bitter and less sweet. 2.)Red: Sweetest and most mature. 3.)Yellow/Orange: Sweet and mild, but not as sweet as red. Appearance, Bell peppers have a glossy, smooth skin and a blocky, bell-like shape. They typically have three to four lobes.