Colors

• CuO is black
• CuCo3 is green
• Compounds of Group 1/2 (s) are white
• Compounds of Group 1/2 (aq) are colorless
• AgCl is white
• AgBr is cream
• AgI is yellow
• Fe 2+ (s/aq) is green
• Fe 3+ (s/aq) is orange/brown
• Cu (s/aq) is blue
• Cr 3+ (s/aq) is green
• Cr 6+ (s/aq) is orange
• Mn 7+ (s/aq) is purple
• Mn 2+ (s/aq) is light pink/colorless
• CuSO4 anhydrous (s) is white
• CuSO4 hydrated (s) is blue
• Lithium in a flame test is red
• Sodium in a flame test is orange/yellow
• Barium in a flame test is apple green
• Copper in a flame test is green/blue
• Potassium in a flame test is lilac
• Calcium in a flame test is brick red
• Copper (s/l) is red/brown
• Gold (s/l) is yellow
• All other metals (s/l) are gray
• Fluorine (g) is pale yellow
• Fluorine (aq) is colorless
• Chlorine (g) is green
• Chlorine (aq) is yellow
• Bromine (l) is brown/red
• Bromine (g/aq) is orange
• Iodine (s) is gray
• Iodine (g) is purple
• Iodine (aq) orange/brown
• Sulfur (s) yellow
• Oxygen/nitrogen/hydrogen (g) is colorless
• Universal Indicator in an acid is red
• Universal Indicator in a base is purple
• Universal Indicator in a neutral substance is green
• Phenolphthalein in an acid is colorless