Indicator

Indicator: Litmus
Acid solution: RED
Neutral solution: PURPLE
Alkali solution: BLUE

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Indicator: Phenolphthalein
Acid solution: Colourless
Neutral solution: Colourless
Alkali solution: PINK

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Indicator: Methyl Orange
Acid solution: PINK
Neutral solution: ORANGE
Alkali solution: YELLOW

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Indicator: Bromothymol Blue
Acid solution: YELLOW
Neutral solution: GREEN
Alkali solution: BLUE

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Indicator: Cresol Puple
Acid solution: YELLOW
Neutral solution: GREEN
Alkali solution: PURPLE