Syrup juice from Canned fruits + Ribena = BLUE+PURPLE ???? whatde??

*3rd post for the day!! wow...that sure is rare............heh.....today no appointment ma....free a little*

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Yesterday FIL opened a can of mata kuching (I have no idea what brand).

Hubby, me and FIL eating...gulp gulp.....finish. *Wipe mouth*

Then, I saw that there is a little syrup left and some ice so I thought, Dont waste lah.
Soooooo, I poured some Ribena and added water and keep inside the fridge.

Later at night, MIL asked who made the ribena .....she say she drank 3 cups.....yum...think she liked it.

I thought, wow, must be very nice loh........

So i took the left-overs from the fridge and poured into a WHITE color mug.............and GOODNESSS ME!!!!!!!
Its horrible!!! The RIBENA totally changed color. It was PURPLE!!!!! i know i know, Ribena is suppose to be purple duh!!!!
But noonono, trust me, it was like BLUEish and PURPLElish and....yucks...looks like water color.

I quickly pour away all the left over and rinse the tupperwear.

I dare not tell MIL what she drank ....gulp...........

*fashionasia whispers: shhhh.......u dun tell i dun tell, sweep it under the carpet k.*


Somebody with chemistry background care to tell me what kinda chemical reaction just happened back there?