I think it was actually supposed to be a dietary supplement for reptiles - it's made to be fine enough so they don't get impacted. I didn't read the bag much before, I just saw it was $7 instead of $17! I was just using potting soil before but a friend recommended pet safe sand, I don't remember...
I figure the colouration comes from the Beta Carotene which seems fine given it's a plant pigment. I'll laugh at my birds with a clear conscience now before switching out their bath.
So since the orange sand bag was the cheapest they had at the store that didn't have grains too fine that was what I got, but unfortunately and hilariously it has dyed my buttons orange. Is the dye in the sand harmful to them? Either way I think I'm going to switch what I use for their baths.