Kosher all year around
Description: Indigo carmine, Indigotine, FD&C Blue 2 (food colouring)
Function: food colouring
Rationale:
Indigo carmine/Indigotine is a fully synthetic dye (name notwithstanding, unrelated to cochineal carmine) with no kashrus concern.
If you don't see a status above, it does not mean the additive is not kosher automatically - it might just not be documented in our database yet.