What is the colour of grape juice when acid is poured in it??

SO BASICALLY WHEN ACID

IS POURED IN GRAPE JUICE 

IT TURNS INTO pink or red 

COLOUR AS GRAPE JUICE 

IS AN INDICATOR WHIICH

CHANGES ITS'S COLOUR

WHEN IT IS ADDED TO AN 

ACID OR A BASE 

FOR EXAMPLE:-

Grape juice indicator. ... Vinegar is acidic and turns grape juice pink/red. Baking soda is alkaline and turns grape juice dark green