(The Best Years in Life) When it comes to fruits and vegetables, there are generally five primary color categories. These include red, blue and purple, yellow and orange, white, and green. Each color category is said to play a different role in health. White, for instance, tends to inhibit cancer and lower cholesterol levels, as well as bolster heart health. The yellow and orange category contributes to healthy eyes as do greens, which also stop cancer growth. Read More.