Some studies show that phytochemicals have the following
benefits:
Act as antioxidants
Stimulate detoxification enzymes
Stimulate the immune system
Positively affect hormones
Act as antibacterial or antiviral agents
Phytochemicals are usually related to the color of fruits and
vegetables- green, yellow-orange, red, blue-purple, and white.
Hundreds of phytochemicals have been discovered.
GREEN BENEFITS
Lutein and Zeaxanthin Turnip, Collard, and Mustard Greens,
Kale,
Spinach, Lettuce, Broccoli, Green peas, Kiwi, Honeydew
Melon
Indoles Broccoli, Cabbage, Brussels Sprouts, Bok Choy, Arugala,
Swiss Chard, Turnips, Rutabaga, Watercress,
Cauliflower, Kale
Vitamin K Swiss Chard, Kale, Brussels Sprouts, Spinach, Turnip
Greens, Watercress, Endive, Lettuce, Mustard Greens, Cabbage
Potassium Leafy greens, Broccoli
RED BENEFITS
Vitamin C
Cranberries, Pink grapefruit, Raspberries, Strawberries,
Watermelon, Red Cabbage, Red Pepper, Radishes, Tomatoes
Anthocyanins Raspberries, Cherries, Strawberries, Cranberries,
Beets,
Apples, Red Cabbage, Red Onion, Kidney Beans, Red Beans
YELLOW/ORANGE BENEFITS
Beta-Carotene & Vitamin A
Carrots, Sweet potatoes, Pumpkin,
Butternut Squash, Cantaloupe,
Mangoes, Apricots, Peaches
Bioflavonoids & Vitamin C  Oranges, Grapefruit, Lemons,
Tangerines, Clementines,
Peaches, Papaya, Apricots, Nectarines,
Pears, Pineapple, Yellow Raisins, Yellow Pepper
Potassium Bananas, Oranges, Grapefruit, Lemons, Pineapple,
Apricots
phytochemical
A phytochemical (fight-o-chemical) is a natural bioactive
compound found in fruits and vegetables that works together
with vitamins, minerals, and fiber to promote good benefit
your health in many ways. The bioactive functions of
phytochemicals  or the way they work in your body is an
ongoing area of research.
BLUE/PURPLE BENEFITS
Anthocyanins & Vitamin C
Blueberries, Blackberries, Purple
Grapes,
Black Currants, Elderberries
Phenolics Dried Plums (Prunes), Raisins, Plums, Eggplant
WHITE BENEFITS
Allium & Allicin
Garlic, Onions, Leeks, Scallions, Chives
Alkaloids

*
Caffeine
* Theobromine
* Theophylline
Monoterpenes

*
Geraniol
* Limonene
Anthocyanins

*
Cyanidin
Organosulfides

*
Allicin (Garlic)
* Glutathione
* Indole-3-Carbinol
*
Isothiocyanates
* Sulforaphane
Carotenoids

*
Beta-Carotene
* Lycopene
Other Phytochemicals

* Damnacanthal
* Digoxin
*
Phytic acid
Coumestans
Phenolic Acids

* Capsaicin / Capsaicin
* Ellagic Acid
* Gallic acid
* Rosmarinic acid
* Tannic Acid
Flavan-3-Ols
Phytosterols

*
Beta-Sitosterol
Flavonoids

* Epicatechin
* Hesperidin
* Kaempferol
* Naringin
* Nobiletin
* Proanthocyanidins
* Quercetin
* Resveratrol
* Rutin
* Tangeretin
Saponins
Hydroxycinnamic Acids

*
Chicoric acid
* Coumarin
* Ferulic acid
* Scopoletin
Triterpenoids

*
Ursolic acid
Isoflavones

*
Daidzein
* Genistein
Xanthophylls

* Astaxanthin
* Beta-Cryptoxanthin
Lignans

* Silymarin (Milk Thistle)
 
Monophenols

*
Hydroxytyrosol
 
The following is another classification for your
reference:
Emodin
Fucoidan
Honokiol
Osthole
Pterostilbene
Theobromine