Question About Ada Ferts, Unusual Colouring?

Hi everyone! Hoping maybe someone here can help me or have seen this before.

I recently switched to the ADA green brighty line of ferts, and purchased some Green Brigthy Nitrogen. The strange thing is that the liquid is green, not the blue I expected from all the pictures.

Now i'm wondering if maybe there was a mixup (?) at the store I bought it from, or maybe it's old stock? Has anyone seen their ada fert be the wrong colour like this?

Thanks!
Bernard