Black
Acetazolamide Alcohols
Aluminum hydroxide Aminophylline
Amphetamine Amphotericin
Anticoagulants Aspirin
Betamethasone Bismuth
Charcoal Chloramphenicol
Chlorpropamide Clindamycin
copper Cortisone
Corticosteroids Cyclophosphamide
Cytarabine Ethacyrnic acid
Ferrous salts fluorides
Fluorouracil Halothane
Heparin Hydralazine
Hydrocortisone Ibuprofen
Indomethacin Iron salts
Levodopa Melphalan
Methlprednisolone Methotrexate
Nitrates Phenylephrine
Phosphorous Potassium salts
Prednisolone Procarbazine
Salicylates Sulfonamides
Tetracycline Thallium
Theophylline Thiotepa
Triamcinolone Warfarin
Blue
Boric acid (ingested) Chloramphenicol
Methylene blue  
Dark brown
Dexamethasone Cocoa
Gray
Cocoa Colchicine
Green
Indomethacin Iron
Medroxyprogesterone spinach
Yellow to yellow-green
Rhubarb senna
Red / Pink
Anticoagulants aspirin
blackberries barium
heparin lead
Oxyphenbutazone Phenolphthalenin
Phenylbutazone Salicylates
senna Tetracycline syrup
Hydroxocobalamin  
Orange-Red
Phenazopyridine Rifampin
.. . . . . ......        .....White/ speckling ..... . . . . . . . . . . .
Aluminum hydroxide Antibiotics (oral)
Barium  

REFERENCE(S)
National Institutes of Health, U.S. National Library of Medicine, DailyMed Database.
Provides access to the latest drug monographs submitted to the Food and Drug Administration (FDA). Please review the latest applicable package insert for additional information and possible updates.  A local search option of this data can be found here.