What colour is a giraffe's tongue and spit?

Blue?

Black?

Blue/Black?

Depends on who you ask. The same is true of the iodine-starch complex. Depending on who you ask, will depend on what colour they say it is.

So if in an exam question they ask what colour is  Iodine Starch complex. Go Blue, black, blue/black. It's all the same to the average giraffe (or examiner)